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Ba9RE2(SiO4)6 (RE=Ho-Yb): A New Family of Rare-earth based Honeycomb Lattice Magnets

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arxiv 2305.12214 v1 pith:XKG3BCIB submitted 2023-05-20 cond-mat.str-el

Andi Liu , Fangyuan Song , Zhaohu Li , Malik Ashtar , Yuqi Qin , Dingjun Liu , Zhengcai Xia , Jingxin Li
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Zhitao Zhang Wei Tong Hanjie Guo Zhaoming Tian
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keywords magneticba9re2compoundsho-ybsio4downfamilyhoneycomb
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Rare-earth (RE) based honeycomb-lattice materials with strong spin-orbit coupled Jeff=1/2 moments have attracted great interest as a platform to realize Kitaev quantum spin liquid (QSL) state. Herein, we report the discovery of a new family of RE based honeycomb-lattice magnets Ba9RE2(SiO4)6(RE=Ho-Yb), which crystallize into the rhombohedral structure with space group R-3. In these serial compounds, magnetic RE3+ ions are arranged on a perfect honeycomb lattice within the ab-plane and stacked in the ABCABC-type fashion along the c-axis. All Ba9RE2(SiO4)6(RE=Ho-Yb) polycrystals exhibit the dominant antiferromagnetic interactions and absence of magnetic order down to 2 K. In combination with the magnetization and electron spin resonance (ESR) results, distinct anisotropic magnetic behaviors are proposed for compounds with different RE ions. Moreover, the synthesized Ba9Yb2Si6O24 single crystals show large magnetic frustration and no long-range magnetic ordering down to 0.15 K, being a possible QSL candidate state. These serial compounds are attractive for exploring the exotic magnetic phases of Kitaev materials with 4f electrons.

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  1. Magnetocalorics of singlet ground state induced moment magnets

    cond-mat.str-el 2025-07 conditional novelty 6.0 of 10

    For singlet-singlet induced-moment magnets, the paper derives field-dependent specific heat, magnetocaloric and barocaloric rates, and shows the antiferromagnetic soft mode is arrested except at zero and critical field.

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