RECORD
Local and collective magnetism of EuFe$_2$As$_2$
Superconductivity · Submitted 28 Mar 2017
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Thus, our experiments lead us to the conclusion that the effect of the high magnetic moment of Eu on the magnitude of both Fe local magnetic moment and spin excitations is small and confined to low energy excitations.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
We present an experimental study of the local and collective magnetism of $\mathrm{EuFe_2As_2}$, that is isostructural with the high temperature superconductor parent compound $\mathrm{BaFe_2As_2}$. In contrast to $\mathrm{BaFe_2As_2}$, where only Fe spins order, $\mathrm{EuFe_2As_2}$ has an additional magnetic transition below 20 K due to the ordering of the Eu$^{2+}$ spins ($J =7/2$, with $L=0$ and $S=7/2$) in an A-type antiferromagnetic texture (ferromagnetic layers stacked antiferromagnetically). This may potentially affect the FeAs layer and its local and correlated magnetism. Fe-K$_\beta$ x-ray emission experiments on $\mathrm{EuFe_2As_2}$ single crystals reveal a local magnetic moment of 1.3$\pm0.15~\mu_B$ at 15 K that slightly increases to 1.45$\pm0.15~\mu_B$ at 300 K. Resonant inelastic x-ray scattering (RIXS) experiments performed on the same crystals show dispersive broad (in energy) magnetic excitations along $\mathrm{(0, 0)\rightarrow(1, 0)}$ and $\mathrm{(0, 0)\rightarrow(1, 1)}$ with a bandwidth on the order of 170-180 meV. These results on local and collective magnetism are in line with other parent compounds of the $\mathrm{AFe_2As_2}$ series ($A=$ Ba, Ca, and Sr), especially the well characterized $\mathrm{BaFe_2As_2}$. Thus, our experiments lead us to the conclusion that the effect of the high magnetic moment of Eu on the magnitude of both Fe local magnetic moment and spin excitations is small and confined to low energy excitations.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We present an experimental study of the local and collective magnetism of $\mathrm{EuFe_2As_2}$, that is isostructural with the high temperature superconductor parent compound $\mathrm{BaFe_2As_2}$. | contribution 0.92 | 0.75 | 0.03 | asserted 0.97 |
| s1 | In contrast to $\mathrm{BaFe_2As_2}$, where only Fe spins order, $\mathrm{EuFe_2As_2}$ has an additional magnetic transition below 20 K due to the ordering of the Eu$^{2+}$ spins ($J =7/2$, with $L=0$ and $S=7/2$) in an A-type antiferromagnetic texture (ferromagnetic layers stacked antiferromagnetically). | result 0.78 | 0.28 | 0.07 | asserted 1.00 |
| s2 | This may potentially affect the FeAs layer and its local and correlated magnetism. | background 0.39 | 0.06 | 0.03 | hedged possibility 1.00 |
| s3 | Fe-K$_\beta$ x-ray emission experiments on $\mathrm{EuFe_2As_2}$ single crystals reveal a local magnetic moment of 1.3$\pm0.15~\mu_B$ at 15 K that slightly increases to 1.45$\pm0.15~\mu_B$ at 300 K. | result 1.00 | 0.96 | 0.04 | asserted 1.00 |
| s4 | Resonant inelastic x-ray scattering (RIXS) experiments performed on the same crystals show dispersive broad (in energy) magnetic excitations along $\mathrm{(0, 0)\rightarrow(1, 0)}$ and $\mathrm{(0, 0)\rightarrow(1, 1)}$ with a bandwidth on the order of 170-180 meV. | result 0.99 | 0.95 | 0.04 | asserted 1.00 |
| s5 | These results on local and collective magnetism are in line with other parent compounds of the $\mathrm{AFe_2As_2}$ series ($A=$ Ba, Ca, and Sr), especially the well characterized $\mathrm{BaFe_2As_2}$. | interpretation 0.68 | 0.36 | 0.08 | asserted 0.72 |
| s6 | Thus, our experiments lead us to the conclusion that the effect of the high magnetic moment of Eu on the magnitude of both Fe local magnetic moment and spin excitations is small and confined to low energy excitations. | interpretation 1.00 | 0.90 | 0.94 | asserted 0.97 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
We present an experimental study of the local and collective magnetism of $\mathrm{EuFe_2As_2}$, that is isostructural with the high temperature superconductor parent compound $\mathrm{BaFe_2As_2}$. In contrast to $\mathrm{BaFe_2As_2}$, where only Fe spins order, $\mathrm{EuFe_2As_2}$ has an additional magnetic transition below 20 K due to the ordering of the Eu$^{2+}$ spins ($J =7/2$, with $L=0$ and $S=7/2$) in an A-type antiferromagnetic texture (ferromagnetic layers stacked antiferromagnetically). This may potentially affect the FeAs layer and its local and correlated magnetism. Fe-K$_\beta$ x-ray emission experiments on $\mathrm{EuFe_2As_2}$ single crystals reveal a local magnetic moment of 1.3$\pm0.15~\mu_B$ at 15 K that slightly increases to 1.45$\pm0.15~\mu_B$ at 300 K. Resonant inelastic x-ray scattering (RIXS) experiments performed on the same crystals show dispersive broad (in energy) magnetic excitations along $\mathrm{(0, 0)\rightarrow(1, 0)}$ and $\mathrm{(0, 0)\rightarrow(1, 1)}$ with a bandwidth on the order of 170-180 meV. These results on local and collective magnetism are in line with other parent compounds of the $\mathrm{AFe_2As_2}$ series ($A=$ Ba, Ca, and Sr), especially the well characterized $\mathrm{BaFe_2As_2}$. Thus, our experiments lead us to the conclusion that the effect of the high magnetic moment of Eu on the magnitude of both Fe local magnetic moment and spin excitations is small and confined to low energy excitations.
Human review
How the literature uses it
What this paper does with the arXiv papers it cites
What it cites · 7 sentences without a confident label
Uses the method or tool of 2 papers
-
As red solid line we plot also the reference spectrum collected on FeCrAs, which has been chosen, as in previous works [ref] , because of the absence of magnetic moment on Fe atoms and represents a suitable reference material to apply the integrated absolute difference (IAD) method [ref] .
Magnetic moment evolution and spin freezing in doped BaFe$_{2}$As$_{2}$ · Results and discussion · 0.92
-
Additionally in Fig. [ref](a) and (b) we illustrate as blue shadowed region the difference spectra obtained after using the same center of mass and subtraction of the reference spectrum as described in previous works [ref] .
Evidences of Mott physics in iron pnictides from x-ray spectroscopy · Results and discussion · 0.99
Compares with 1 paper
-
The values measured for $EuFe_2As_2$ are similar to the values obtained for $BaFe_2As_2$ ($μ_bare=1.3±0.15$ at 15 K and $μ_bare=1.5±0.15$ at 300 K) [ref] .
Magnetic moment evolution and spin freezing in doped BaFe$_{2}$As$_{2}$ · Results and discussion · 0.97
Cites as support 1 paper
-
The increase of $μ_bare$ with temperature is incompatible with the nesting scenario and it has been shown that instead a spin freezing transition driven by the competition of Hund's coupling, electronic screening, and Fermi surface nesting arguments is more likely and in agreement with systematic spectroscopic measurements on parent and doped Fe pnictides [ref] .
Magnetic moment evolution and spin freezing in doped BaFe$_{2}$As$_{2}$ · Results and discussion · 0.96
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.