Field-induced magnetic order in DyTa$_7$O$_{19}$ with two-dimensional pseudospin-$\frac{1}{2}$ triangular lattice

Chenglin Shang; Feihao Pan; Jieming Sheng; Liusuo Wu; Nan Zhao; Peng Cheng; Songnan Sun

REVIEW 4 major objections 7 minor 34 references

Field-induced magnetic order in DyTa$_7$O$_{19}$ with two-dimensional pseudospin-$\frac{1}{2}$ triangular lattice

T0 review · 4 major / 7 minor · reviewed 2026-08-07 · deepseek-v4-flash

Challenge this review Re-run · record.json Download PDF Read on arXiv ↗

Pith's one-line read In DyTa7O19, a 0.1-tesla field induces an up-up-down magnetic order below 0.14 K, which the paper attributes to dipole-dipole interactions between Ising-like Dy3+ pseudospins.

desk verdict A credible field-induced 1/3 magnetization plateau in a triangular-lattice magnet, wrapped in an overreaching dipolar-calculation claim that does not actually explain the phase diagram. read the letter →

arxiv 2506.06047 v1 pith:ACTYT7A5 submitted 2025-06-06 cond-mat.str-el cond-mat.mtrl-sci

Feihao Pan , Nan Zhao , Songnan Sun , Chenglin Shang , Peng Cheng , Jieming Sheng , Liusuo Wu This is my paper

classification cond-mat.str-elcond-mat.mtrl-sci

keywords frustratedmagnetismtriangularlatticedipole-dipoleinteractionup-up-downorderIsinganisotropypseudospin-1/2DyTa7O19field-inducedmagnetic

verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

The paper reports that DyTa7O19, whose Dy3+ ions form an essentially ideal two-dimensional triangular lattice, shows no long-range magnetic order by itself down to 100 mK, but orders under a small magnetic field. Applying about 0.1 T along the easy c-axis produces an ordered state below $T_m=0.14$ K with magnetization exactly one-third of the saturation value, the signature of an up-up-down spin arrangement. The paper argues that this field-induced order is driven by classical magnetic dipole-dipole interactions between Ising-like spins, not by exchange coupling, because the calculated dipolar energy landscape reproduces both the ordering temperature and the dome-shaped field-temperature phase diagram. If this is right, DyTa7O19 is a rare clean platform for studying pure dipolar Ising physics on a geometrically frustrated lattice.

What carries the argument

The central object is the classical dipole-dipole energy sum $E_{\mathrm{dipole}} = -\frac{\mu_0}{4\pi}\sum_{i<j} \frac{1}{|\mathbf{r}_{ij}|^3}[3(\mathbf{m}_i\cdot\hat{\mathbf{r}}_{ij})(\mathbf{m}_j\cdot\hat{\mathbf{r}}_{ij})-\mathbf{m}_i\cdot\mathbf{m}_j]$, evaluated with all Dy3+ moments fixed along the c-axis, together with the Zeeman term $E_{\mathrm{Zeeman}} = -\sum_i \mathbf{B}\cdot\mathbf{m}_i$. Comparing the total energy among three collinear states in a $2\times2$ or $3\times3$ magnetic cell, the ferromagnetic state, the antiferromagnetic stripe state with $\mathbf{k}=(1/2,1/2,0)$, and the up-up-down state with $\mathbf{k}=(1/3,1/3,0)$, yields the field sequence stripe to UUD to ferromagnetic. The crossover fields of roughly 0.02 T and 0.12 T, and the dipolar energy scale near 0.26 K, are what connect the calculation to the measured transition temperature and to the dome-shaped phase boundary.

What would settle it

A single-crystal neutron diffraction experiment at $B\approx0.1$ T along c and $T\approx0.07$ K should show magnetic Bragg peaks at $\mathbf{k}=(1/3,1/3,0)$ with the two-up-one-down pattern and a net moment of $M_s/3$, while inelastic neutron scattering should independently bound the exchange coupling. If the ordered pattern is not UUD, or if the extracted exchange energy is comparable to the calculated 0.26 K dipolar energy scale, the dipole-driven explanation fails.

Watch

Extended reading notes

Core claim

The paper establishes that DyTa7O19 is an easy-axis Ising-like magnet with a doublet ground state acting as an effective spin-1/2, no long-range order at zero field down to 0.1 K, and a field-induced phase below $T_m=0.14$ K with net moment $M_s/3$ when the field is applied along the c-axis at about 0.1 T. Since one-third of saturation is the only natural moment for a collinear state on a triangular lattice, and since susceptibility and heat capacity both show a transition at the same temperature, the paper identifies this phase as an up-up-down (UUD) structure. It then computes the dipole-dipole energy of candidate collinear states with moments pinned along c, adding the Zeeman term, and finds that the UUD structure becomes lowest in energy above about 0.02 T and remains favorable until about 0.12 T, matching the field window where order is observed. The paper concludes that dipole-dipole interactions, not exchange, drive the field-induced UUD order, making DyTa7O19 a platform for Ising-like dipolar frustration.

Load-bearing premise

The load-bearing premise is that exchange coupling between neighboring Dy3+ ions is negligible compared with the dipole-dipole interaction; the paper infers this from the large 6.2 Å nearest-neighbor distance and from sister-compound studies rather than measuring it directly in DyTa7O19.

Editorial extensions

If this is right

If the UUD phase is dipolar in origin, DyTa7O19 is the first member of the RTa7O19 family to show long-range field-induced order, with the order appearing only when a field relieves the zero-field frustration.
The measured ordering temperature $T_m=0.14$ K and its dome-like field dependence are the thermodynamic fingerprints of the competition among dipolar UUD, stripe, and ferromagnetic states, so further magnetization and heat-capacity scans near 0.1 T should trace this same dome.
The absence of zero-field order down to 0.1 K, despite a calculated stripe-state energy of $-0.147$ K, implies that frustration keeps the system in a short-range-ordered or spin-liquid-like regime at zero field, which invites direct low-temperature probes of that state.
Because the saturation field is only about 0.4 T, DyTa7O19 may be a useful adiabatic demagnetization refrigerant that can be driven by simple permanent magnets.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

If the dipolar interpretation is right, the tiny 0.1 T field should also act as a sharp magnetocaloric switch near 0.14 K; measuring the entropy change across the phase boundary directly would test that prediction.
The paper's restriction of the dipolar sum to $2\times2$ and $3\times3$ cells leaves open the possibility of longer-wavelength or incommensurate dipolar instabilities, so a full Ewald-summation treatment could shift the UUD stability window.
The Dy3+ ground-state wavefunction reported in the paper has a minimum spin-flip magnitude of $\Delta S=3$, which suggests higher-order multipolar couplings may contribute at ultra-low temperatures; confirming or excluding those would refine the pure-dipolar picture beyond the present data.
Applying the same ultra-low-temperature protocol to other RTa7O19 compounds with different rare-earth moments should show a systematic trend in field-induced ordering temperature and saturation field, giving a family-wide test of the dipolar mechanism.

Share X Bluesky LinkedIn Reddit HN

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Desk Editor's Note

read the letter

Short version: the paper is worth reading for the experimental finding, less for the theory. They show DyTa7O19, a clean triangular lattice of easy-axis Dy3+ moments, orders below 0.14 K in a small c-axis field, with a magnetization plateau at exactly one-third of saturation. That is a new and credible observation: specific heat shows a sharp peak, susceptibility shows a kink, and the plateau is clearly visible. No zero-field long-range order is seen down to 0.1 K, which the data support. The UUD interpretation is the natural guess for a 1/3 plateau on a triangular lattice, but it is an inference, not a measurement—no neutron diffraction is offered.

The theory section is the weak part. The authors compute T=0 dipolar energies for three candidate spin configurations on a 2x2 or 3x3 cell, find an AFM-stripe ground state at zero field and a UUD ground state between about 0.02 and 0.12 T, and then state this 'well explains' the measured phase diagram. It does not. A ground-state energy crossing does not give the dome of Tm(B), and no finite-T calculation is presented. The paper itself notes the zero-field discrepancy—the model predicts an ordered stripe state, but none is observed—and waves at possible frustration. That is honest, but it means the model cannot explain the zero-field regime. The calculation is not a fit, which helps: it uses lattice constants and the saturated moment as inputs. But it is a consistency check, not a derivation of the phase diagram.

What is good: the experimental characterization is careful, the entropy integrates to roughly Rln2 consistent with a Kramers doublet, the CEF calculation supports the Ising anisotropy, and the ADR motivation is reasonable. The authors are also candid about the lack of microscopic confirmation.

My take: send this to a serious referee. The core observation is solid and will be useful to the community; the theoretical overlay needs tempering, or ideally a finite-T dipolar simulation. A referee should press on the 'well explained' claim and the zero-field gap. If the authors can either soften the language or add a proper calculation, this becomes a nice paper.

Referee Report

4 major / 7 minor

Summary. DyTa7O19 is a rare-earth heptatantalate with Dy3+ ions on an ideal two-dimensional triangular lattice. The authors report single-crystal magnetization and specific heat measurements down to about 70-100 mK. They find strong c-axis Ising anisotropy and a pseudospin-1/2 Kramers doublet ground state, with no long-range magnetic order at zero field down to 0.1 K. Under a field of about 0.1 T applied along c, a phase transition at T_m=0.14 K is observed in both chi(T) and C_M(T). The isothermal magnetization shows a plateau at M_s/3 at low temperatures, which the authors interpret as an up-up-down (UUD) structure. A calculation of the dipole-dipole interaction energy for FM, AFM-stripe, and UUD configurations in a small cluster predicts that the UUD state is lowest in energy between roughly 0.02 T and 0.12 T, and the authors argue that this consistency supports a DDI-driven UUD order. They further propose DyTa7O19 as a platform for studying pure Ising-like dipolar interactions on a frustrated triangular lattice.

Significance. The experimental data (low-temperature magnetization, specific heat, entropy, anisotropic susceptibility, and a B-T phase diagram) are of good quality, and the observation of a field-induced transition with M_s/3 magnetization is a solid result. The proposed mechanism, field-induced UUD order driven solely by dipolar interactions, is intriguing and, if confirmed, would be a rare realization of dipolar frustration on a perfect triangular lattice, with potential implications for both fundamental frustrated magnetism and sub-kelvin refrigeration. The DDI model is concrete and makes falsifiable predictions, namely the k=(1/3,1/3,0) order and a narrow field window. However, the current manuscript does not fully establish the central claim: the calculation is a T=0 energy comparison of a few configurations rather than a computation of T_m or the phase diagram; the UUD assignment is inferred only from the magnetization plateau; and the neglect of exchange is asserted rather than demonstrated. These gaps require additional work before the interpretation can be regarded as established.

major comments (4)

[Magnetic dipolar interactions (E_dipole and E_Zeeman expressions; Fig. 5)] The theoretical calculation is a T=0 comparison of the energies of three ordered states computed in a 2x2 or 3x3 cluster; it does not compute the ordering temperature T_m or the temperature-field phase diagram. The abstract and Conclusions claim that the ordering temperature and temperature-field phase diagram can be well explained by the DDI model, but no finite-temperature calculation is presented. A T=0 energy crossing between AFM-stripe and UUD at about 0.02 T and between UUD and FM at about 0.12 T cannot by itself produce the measured dome-like T_m(B) with a maximum near 0.1 T. A finite-temperature treatment of the same DDI Hamiltonian (e.g., Monte Carlo or mean-field) is required to test whether the model reproduces T_m about 0.14 K at 0.1 T and no long-range order above 0.1 K at zero field; without it, the central explanatory claim is unsupported.
[Field-induced magnetic order and phase diagram (Fig. 3(b), Fig. 5(a))] The M_s/3 plateau is the sole basis for assigning the field-induced phase to the UUD structure; no direct magnetic structure probe (e.g., neutron diffraction) is reported. The paper only compares three candidate states in the DDI calculation, and on a triangular lattice with Ising c-axis moments, other three-sublattice configurations with net M_s/3 are conceivable. Direct structural evidence or at least a systematic search over all symmetry-distinct spin configurations and propagation vectors consistent with the M_s/3 plateau is needed to justify the UUD assignment.
[Magnetic dipolar interactions (Fig. 2(d))] The model neglects exchange interactions relative to DDI, but no direct measurement or quantitative bound on the exchange coupling is provided. The low-temperature Curie-Weiss temperature is theta_c^CW = -1.44 K, which is an order of magnitude larger than the calculated DDI energy scale (maximum about 0.26 K); if this Curie-Weiss temperature reflects exchange or a mixture of exchange and DDI, the neglect of exchange in the Hamiltonian is unjustified. The paper should provide an explicit estimate of the DDI-only Curie-Weiss temperature and a bound on the exchange coupling, or identify a measurement (e.g., inelastic neutron scattering) that demonstrates exchange to be negligible.
[Magnetic dipolar interactions (E_dipole expression)] The DDI energy is truncated at a 2x2 or 3x3 magnetic cell, and the statement that interactions with atoms beyond this range have little influence is an assertion, not a convergence test. Because the energy differences between the competing states are only tens of mK, the truncation error could be comparable to the spacing between the curves in Fig. 5(b). The manuscript should report a convergence check with larger supercells and/or an Ewald-summation treatment of the lattice sums, and should specify which cell size was used for each magnetic structure (a 2x2 cell cannot accommodate a UUD state with k=(1/3,1/3,0)).

minor comments (7)

[Introduction] The word 'mangy' should be 'many'.
[Methods] The text after 'To' contains a long unreadable string of slash-separated numbers (e.g., '/s50/s48 /s52/s48 ...'), which appears to be a text-encoding artifact; this passage should be restored or removed.
[Results and Discussions] There are several typos: 'aniferromagnetic' should be 'antiferromagnetic', and 'Kramer' should be 'Kramers'.
[Reference [21]] Reference [21] is incomplete: the journal name 'Acta Crystallographica Section C Crystal Structure Communications' is cut off mid-sentence.
[Fig. 3(c)] The contour plot of dM/dB would benefit from an explicit color scale and labeled axes; currently the phase boundaries are hard to read.
[Fig. 5(a)] The symbols used for the different data sets (five-pointed stars, orange triangles, green spheres) are not defined in the caption.
[CEF paragraph (Results)] The statement about a minimum spin-flip magnitude Delta S=3 and possible higher-order multipole interactions is not connected to the subsequent DDI-only calculation; please clarify whether these multipoles are expected to be negligible at the energy scales relevant to the phase diagram.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity: the DDI calculation is a parameter-free consistency check; the finite-T phase-diagram claim is an overreach but not a circular reduction.

full rationale

The paper's central claim is that the field-induced M_s/3 plateau and ordering dome in DyTa7O19 are explained by magnetic dipole-dipole interactions between Ising-like Dy moments. The DDI energy calculation uses independent inputs — measured lattice constants, saturation moment, and an Ising-anisotropy assumption — and returns stability windows (UUD stable between ~0.02 T and ~0.12 T, FM above ~0.12 T) that are then compared with the measured phase boundaries. The experimental M_s/3 plateau is used to select the UUD candidate, but the energy calculation tests this candidate against FM and AFM-stripe states rather than fitting any parameter to the transition temperature or dome shape. There is no equation in which the claimed result (UUD stability, field range, relative energy ordering) is defined in terms of the observed T_m or phase boundary. The narrative does contain an inference gap: only T=0 energies are computed, so the statement that the T_m(B) dome is 'well explained' goes beyond what the calculation demonstrates; that is a validity/overclaim concern, not circularity. Self-citations to prior RTa7O19 work (refs. 20, 22) supply independent empirical context for weak exchange and crystal growth, and are not used as a uniqueness theorem. I therefore find no circular reduction in the derivation chain.

Assumptions & free parameters 1 free parameters · 4 assumptions · 0 invented entities

The central claim depends on the assumption that exchange is negligible and that the moments behave as classical Ising dipoles. No new entities are introduced. The only hand-chosen numerical choice is the DDI interaction cutoff, which is not fitted to data.

free parameters (1)

DDI interaction cutoff = 3x3 and 2x2 magnetic cell
The dipole-dipole energy sum is truncated to a 3x3 or 2x2 magnetic cell, assuming interactions beyond are negligible. This hand-chosen cutoff could affect relative phase stability, especially for long-range dipolar interactions in two dimensions.

assumptions (4)

domain assumption Exchange interaction is negligible compared to dipole-dipole interaction
The paper states the large Dy-Dy distance and localized 4f electrons indicate weak exchange, but no quantitative measurement is provided. The entire DDI theory rests on this assumption.
domain assumption Dy3+ moments can be treated as Ising-like spins fixed along the c-axis
Based on strong single-ion anisotropy and CEF calculations; the ground-state wavefunction has admixtures of higher |Jz| states, but the DDI calculation treats them as classical Ising dipoles.
standard math Point-dipole approximation for the magnetic interactions
Standard for localized 4f moments, but the CEF analysis suggests higher-order multipole interactions may appear (minimum spin flip delta S=3), which the DDI model ignores.
domain assumption Phonon contribution to specific heat is negligible below 2 K
Based on comparison to nonmagnetic YTa7O19, but the data are not shown. This affects entropy integration and the identification of the magnetic transition.

how reviews work

0 comments

Cite this review

Pith. "Pith review of Field-induced magnetic order in DyTa$_7$O$_{19}$ with two-dimensional pseudospin-$\frac{1}{2}$ triangular lattice." pith.science (2026). https://pith.science/paper/ACTYT7A5

@misc{pith2026250606047,
  author       = {Pith},
  title        = {Pith review of: Field-induced magnetic order in DyTa$_7$O$_19$ with two-dimensional pseudospin-$\frac12$ triangular lattice},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/ACTYT7A5}},
  note         = {Machine review of arXiv:2506.06047}
}

abstract

The magnetic ground state of geometrically frustrated antiferromagnet attracts great research interests due to the possibility to realize novel quantum magnetic state such as a quantum spin liquid. Here we present a comprehensive magnetic characterization of DyTa$_7$O$_{19}$ with ideal two-dimensional triangular lattice. DyTa$_7$O$_{19}$ exhibits $c$-axis single-ion magnetic anisotropy. Although long-range magnetic order is not observed down to 100 mK under zero field, by applying a small magnetic field ($\sim$0.1 T), a magnetically ordered state with net magnetization of $M_s$/3 below $T_m$=0.14 K is identified ($M_s$ denotes the saturated magnetization). We argue that this state is an up-up-down magnetic structure phase driven by the dipole-dipole interactions between Ising-like spins of Dy$^{3+}$ in a two-dimensional triangular lattice, since its ordering temperature and temperature-field phase diagram can be well explained by the theoretical calculations based on dipolar interactions. DyTa$_7$O$_{19}$ could be viewed as a rare material platform that realizing pure Ising-like dipolar interaction in a geometrically frustrated lattice.

Figures

Figures reproduced from arXiv: 2506.06047 by the authors.

**Figure 2.** FIG. 2. Magnetic characterization of DyTa [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗

**Figure 3.** FIG. 3. Magnetization measurement of DyTa [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗

Figures from the paper (2 more)

**Figure 4.** Figure 4: FIG. 4. Heat capacity of DyTa [PITH_FULL_IMAGE:figures/full_fig_p005_4.png]

**Figure 5.** Figure 5: FIG. 5. (a) Magnetic phase diagram of DyTa [PITH_FULL_IMAGE:figures/full_fig_p006_5.png]

Discussion (0). Sign in to comment.

Reference graph

Works this paper leans on

34 extracted references · 33 canonical work pages

[1]

The nearest interplane Dy-Dy distance 9.939 ˚ A is much larger than the nearest intraplane Dy-Dy distance 6.209 ˚ A. Fig. 1 also shows a scanning electron microscope image of one DyTa 7O19 single crystal, which demon- strates its layered structure with hexagonal size of the cleavage ab-plane. RTa7O19 is known as a material family without atomic site disor...

work page
[2]

Y. Li, G. Chen, W. Tong, L. Pi, J. Liu, Z. Yang, X. Wang, and Q. Zhang, Rare-Earth Triangular Lat- tice Spin Liquid: A Single-Crystal Study of YbMgGaO 4, Phys. Rev. Lett. 115, 167203 (2015)

2015
[3]

Shen, Y.-D

Y. Shen, Y.-D. Li, H. Wo, Y. Li, S. Shen, B. Pan, Q. Wang, H. C. Walker, P. Steﬀens, M. Boehm, Y. Hao, D. L. Quintero-Castro, L. W. Harriger, M. D. Frontzek, L. Hao, S. Meng, Q. Zhang, G. Chen, and J. Zhao, Ev- idence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate, Nature 540, 559 (2016)

work page 2016
[4]

W. Liu, Z. Zhang, J. Ji, Y. Liu, J. Li, X. Wang, H. Lei, G. Chen, and Q. Zhang, Rare-Earth Chalcogenides: A Large Family of Triangular Lattice Spin Liquid Candi- dates, Chinese Physics Letters 35, 117501 (2018)

work page 2018
[5]

Zhang, X

Z. Zhang, X. Ma, J. Li, G. Wang, D. T. Adroja, T. P. Per- ring, W. Liu, F. Jin, J. Ji, Y. Wang, Y. Kamiya, X. Wang, J. Ma, and Q. Zhang, Crystalline electric ﬁeld excita- tions in the quantum spin liquid candidate NaYbSe 2, Phys. Rev. B 103, 035144 (2021)

work page 2021
[6]

P.-L. Dai, G. Zhang, Y. Xie, C. Duan, Y. Gao, Z. Zhu, E. Feng, Z. Tao, C.-L. Huang, H. Cao, A. Podlesnyak, G. E. Granroth, M. S. Everett, J. C. Neuefeind, D. Voneshen, S. Wang, G. Tan, E. Mo- rosan, X. Wang, H.-Q. Lin, L. Shu, G. Chen, Y. Guo, X. Lu, and P. Dai, Spinon Fermi Surface Spin Liq- uid in a Triangular Lattice Antiferromagnet NaYbSe 2, Phys. Rev...

work page 2021
[7]

Sheng, L

J. Sheng, L. Wang, A. Candini, W. Jiang, L. Huang, B. Xi, J. Zhao, H. Ge, N. Zhao, Y. Fu, J. Ren, J. Yang, P. Miao, X. Tong, D. Yu, S. Wang, Q. Liu, M. Kofu, R. Mole, G. Biasiol, D. Yu, I. A. Zal- iznyak, J.-W. Mei, and L. Wu, Two-dimensional quantum universality in the spin-1/2 triangular- lattice quantum antiferromagnet Na 2BaCo(PO4)2, Proceedings of th...

work page 2022
[8]

Xiang, C

J. Xiang, C. Zhang, Y. Gao, W. Schmidt, K. Schmalzl, C.-W. Wang, B. Li, N. Xi, X.-Y. Liu, H. Jin, G. Li, J. Shen, Z. Chen, Y. Qi, Y. Wan, W. Jin, W. Li, P. Sun, and G. Su, Giant magnetocaloric eﬀect in spin supersolid candidate Na 2BaCo(PO4)2, Nature 625, 270 (2024)

work page 2024

Show all 34 references

[9]

Tokiwa, S

Y. Tokiwa, S. Bachus, K. Kavita, A. Jesche, A. A. Tsir- lin, and P. Gegenwart, Frustrated magnet for adiabatic demagnetization cooling to milli-Kelvin temperatures, Communications Materials 2, 42 (2021)

2021
[10]

Jesche, N

A. Jesche, N. Winterhalter-Stocker, F. Hirschberger, A. Bellon, S. Bachus, Y. Tokiwa, A. A. Tsir- lin, and P. Gegenwart, Adiabatic demagnetization cooling well below the magnetic ordering tempera- ture in the triangular antiferromagnet KBaGd(BO 3)2, Physical Review B 107, 1044...

2023
[11]

Shimizu, K

Y. Shimizu, K. Miyagawa, K. Kanoda, M. Mae- sato, and G. Saito, Spin liquid state in an or- ganic mott insulator with a triangular lattice, Phys. Rev. Lett. 91, 107001 (2003)

2003
[12]

Z. Zeng, C. Zhou, H. Zhou, L. Han, R. Chi, K. Li, M. Kofu, K. Nakajima, Y. Wei, W. Zhang, D. G. Mazzone, Z. Y. Meng, and S. Li, Spectral evidence for dirac spinons in a kagome lattice antiferromagnet, Nature Physics 20, 1097 (2024)

2024
[13]

S. T. Bramwell and M. J. P. Gingras, Spin ice state in frustrated magnetic pyrochlore materials, Science 294, 1495 (2001)

2001
[14]

D. J. P. Morris, D. A. Tennant, S. A. Grigera, B. Klemke, C. Castelnovo, R. Moessner, C. Czternasty, M. Meissner, K. C. Rule, J.-U. Hoﬀmann, K. Kiefer, S. Gerischer, D. Slobinsky, and R. S. Perry, Dirac strings and magnetic monopoles in the spin ice Dy 2Ti2O7, Science 326, 411 (2009)

2009
[15]

Batle, Topological structures, spontaneous symmet ry breaking and energy spectra in dipole hexagonal lattices, Scientiﬁc Reports 11, 4154 (2021)

J. Batle, Topological structures, spontaneous symmet ry breaking and energy spectra in dipole hexagonal lattices, Scientiﬁc Reports 11, 4154 (2021)

2021
[16]

Ezawa, Giant Skyrmions Stabilized by Dipole- Dipole Interactions in Thin Ferromagnetic Films, Physical Review Letters 105, 197202 (2010)

M. Ezawa, Giant Skyrmions Stabilized by Dipole- Dipole Interactions in Thin Ferromagnetic Films, Physical Review Letters 105, 197202 (2010)

2010
[17]

Politi, M

P. Politi, M. G. Pini, and R. L. Stamps, Dipolar ground state of planar spins on triangular lattices, Physical Review B 73, 020405(R) (2006)

2006
[18]

Kele¸ s and E

A. Kele¸ s and E. Zhao, Absence of Long-Range Order in a Triangular Spin System with Dipolar Interactions, Physical Review Letters 120, 187202 (2018)

2018
[19]

T. Arh, B. Sana, M. Pregelj, P. Khuntia, Z. Jagliˇ ci´ c, M. D. Le, P. K. Biswas, P. Manuel, L. Mangin- Thro, A. Ozarowski, and A. Zorko, The Ising triangular-lattice antiferromagnet neodymium hep- tatantalate as a quantum spin liquid candidate, Nature Materials 21, 416 (2022)

2022
[20]

L. Wang, Z. Ouyang, T. Xiao, Z. Li, and Z. Tian, Syn- thesis, structure and magnetism of RTa 7O19 (R = Pr, Sm, Eu, Gd, Dy, Ho) with perfect triangular lattice, Journal of Alloys and Compounds 937, 168390 (2023)

2023
[21]

F. Pan, S. Sun, A. I. Kolesnikov, M. B. Stone, J. Huang, D. Xu, C. Shang, B. Shi, X. Gui, Z. Sun, J. Wang, J. Liu, H. Zhang, Z. Liu, and P. Cheng, Structural and magnetic characterization of CeTa 7O19 and YbTa 7O19 with a two-dimensional pseudospin- 1 2 triangular lattice, Phy...

2024
[22]

G. C. Guo, J. N. Zhuang, Y. G. Wang, J. T. Chen, H. H. Zhuang, J. S. Huang, and Q. E. Zhang, Dysprosium Tantalum Oxide, DyTa 7O19, Acta Crystallographica Section C Crystal Structure Commun ications
[23]

C. Tian, F. Pan, L. Wang, D. Ye, J. Sheng, J. Wang, J. Liu, J. Huang, H. Zhang, D. Xu, J. Qin, L. Hao, Y. Xia, H. Li, X. Tong, L. Wu, J.-H. Chen, S. Jia, P. Cheng, J. Yang, and Y. Zheng, DyOCl: A rare-earth based two- 9 dimensional van der Waals material with strong magnetic a...

2021
[24]

Rotter, Using McPhase to calculate mag- netic phase diagrams of rare earth compounds, Journal of Magnetism and Magnetic Materials 272-276, E481 (2004)

M. Rotter, Using McPhase to calculate mag- netic phase diagrams of rare earth compounds, Journal of Magnetism and Magnetic Materials 272-276, E481 (2004)

2004
[25]

Scheie, PyCrystalField : software for calculation, anal- ysis and ﬁtting of crystal electric ﬁeld Hamiltonians, Journal of Applied Crystallography 54, 356 (2021)

A. Scheie, PyCrystalField : software for calculation, anal- ysis and ﬁtting of crystal electric ﬁeld Hamiltonians, Journal of Applied Crystallography 54, 356 (2021)

2021
[26]

B. Gao, T. Chen, D. W. Tam, C.-L. Huang, K. Sas- mal, D. T. Adroja, F. Ye, H. Cao, G. Sala, M. B. Stone, C. Baines, J. A. T. Verezhak, H. Hu, J.-H. Chung, X. Xu, S.-W. Cheong, M. Nallaiyan, S. Spagna, M. B. Maple, A. H. Nevidomskyy, E. Morosan, G. Chen, and P. Dai, Experimenta...

2019
[27]

Bairwa, A

D. Bairwa, A. Bandyopadhyay, D. Adroja, G. B. G. Stenning, H. Luetkens, T. J. Hicken, J. A. Krieger, G. Cibin, M. Rotter, S. Rayaprol, P. D. Babu, and S. Elizabeth, Quantum spin liquid ground state in the rare-earth triangular antiferromagnet SmTa 7O19, Phys. Rev. B 111, 104413 (2025)

2025
[28]

N. Zhao, J. Sheng, J. Wang, H. Ge, T. Li, J. Yang, S. Wang, P. Miao, H. He, X. Tong, W. Bao, E.- J. Guo, R. Mole, D. Yu, A. A. Podlesnyak, and L. Wu, Quasi-one-dimensional Ising-like antiferromag- netism in the rare-earth perovskite oxide TbScO 3, Phys. Rev. Materials 7, 034401 (2023)

2023
[29]

N. Li, A. Rutherford, Y. Y. Wang, H. Liang, Y. Zhou, Y. Sun, D. D. Wu, P. F. Chen, Q. J. Li, H. Wang, W. Xie, E. S. Choi, S. Z. Zhang, M. Lee, H. D. Zhou, and X. F. Sun, Possible quantum spin liquid state of CeTa 7O19 (2025), arXiv:2503.00752 [cond-mat.str-el]

2025 arXiv
[30]

A. V. Chubukov and D. I. Golosov, Quan- tum theory of an antiferromagnet on a triangular lattice in a magnetic ﬁeld, Journal of Physics: Condensed Matter 3, 69 (1991)

1991
[31]

O. A. Starykh, Unusual ordered phases of highly frustrated magnets: a review, Reports on Progress in Physics 78, 052502 (2015)

2015
[32]

H. D. Zhou, C. Xu, A. M. Hallas, H. J. Silverstein, C. R. Wiebe, I. Umegaki, J. Q. Yan, T. P. Murphy, J.-H. Park, Y. Qiu, J. R. D. Copley, J. S. Gardner, and Y. Takano, Successive phase transitions and extended spin-excitatio n continuum in the S= 1 2 triangular-lattice antife...

2012
[33]

M. M. Bordelon, E. Kenney, C. Liu, T. Hogan, L. Posthuma, M. Kavand, Y. Lyu, M. Sherwin, N. P. Butch, C. Brown, M. J. Graf, L. Balents, and S. D. Wilson, Field-tunable quantum disordered ground state in the triangular-lattice antiferromagnet NaYbO 2, Nature Physics 15, 1058 (2019)

2019
[34]

D. L. Yuan, H. Li, Z. Yan, H.-T. Wei, W. Li, Y. Qi, and Z. Y. Meng, Phase diagram of the quantum Ising model on a triangular lattice under external ﬁeld, Phys. Rev. B 103, 104416 (2021)

2021

Pith tools

Reviewed August 7, 2026 · model on record in the stance chip above.

[1] [1]

The nearest interplane Dy-Dy distance 9.939 ˚ A is much larger than the nearest intraplane Dy-Dy distance 6.209 ˚ A. Fig. 1 also shows a scanning electron microscope image of one DyTa 7O19 single crystal, which demon- strates its layered structure with hexagonal size of the cleavage ab-plane. RTa7O19 is known as a material family without atomic site disor...

work page

[2] [2]

Y. Li, G. Chen, W. Tong, L. Pi, J. Liu, Z. Yang, X. Wang, and Q. Zhang, Rare-Earth Triangular Lat- tice Spin Liquid: A Single-Crystal Study of YbMgGaO 4, Phys. Rev. Lett. 115, 167203 (2015)

2015

[3] [3]

Shen, Y.-D

Y. Shen, Y.-D. Li, H. Wo, Y. Li, S. Shen, B. Pan, Q. Wang, H. C. Walker, P. Steﬀens, M. Boehm, Y. Hao, D. L. Quintero-Castro, L. W. Harriger, M. D. Frontzek, L. Hao, S. Meng, Q. Zhang, G. Chen, and J. Zhao, Ev- idence for a spinon Fermi surface in a triangular-lattice quantum-spin-liquid candidate, Nature 540, 559 (2016)

work page 2016

[4] [4]

W. Liu, Z. Zhang, J. Ji, Y. Liu, J. Li, X. Wang, H. Lei, G. Chen, and Q. Zhang, Rare-Earth Chalcogenides: A Large Family of Triangular Lattice Spin Liquid Candi- dates, Chinese Physics Letters 35, 117501 (2018)

work page 2018

[5] [5]

Zhang, X

Z. Zhang, X. Ma, J. Li, G. Wang, D. T. Adroja, T. P. Per- ring, W. Liu, F. Jin, J. Ji, Y. Wang, Y. Kamiya, X. Wang, J. Ma, and Q. Zhang, Crystalline electric ﬁeld excita- tions in the quantum spin liquid candidate NaYbSe 2, Phys. Rev. B 103, 035144 (2021)

work page 2021

[6] [6]

P.-L. Dai, G. Zhang, Y. Xie, C. Duan, Y. Gao, Z. Zhu, E. Feng, Z. Tao, C.-L. Huang, H. Cao, A. Podlesnyak, G. E. Granroth, M. S. Everett, J. C. Neuefeind, D. Voneshen, S. Wang, G. Tan, E. Mo- rosan, X. Wang, H.-Q. Lin, L. Shu, G. Chen, Y. Guo, X. Lu, and P. Dai, Spinon Fermi Surface Spin Liq- uid in a Triangular Lattice Antiferromagnet NaYbSe 2, Phys. Rev...

work page 2021

[7] [7]

Sheng, L

J. Sheng, L. Wang, A. Candini, W. Jiang, L. Huang, B. Xi, J. Zhao, H. Ge, N. Zhao, Y. Fu, J. Ren, J. Yang, P. Miao, X. Tong, D. Yu, S. Wang, Q. Liu, M. Kofu, R. Mole, G. Biasiol, D. Yu, I. A. Zal- iznyak, J.-W. Mei, and L. Wu, Two-dimensional quantum universality in the spin-1/2 triangular- lattice quantum antiferromagnet Na 2BaCo(PO4)2, Proceedings of th...

work page 2022

[8] [8]

Xiang, C

J. Xiang, C. Zhang, Y. Gao, W. Schmidt, K. Schmalzl, C.-W. Wang, B. Li, N. Xi, X.-Y. Liu, H. Jin, G. Li, J. Shen, Z. Chen, Y. Qi, Y. Wan, W. Jin, W. Li, P. Sun, and G. Su, Giant magnetocaloric eﬀect in spin supersolid candidate Na 2BaCo(PO4)2, Nature 625, 270 (2024)

work page 2024