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Kobayashi S, Ueda H, Michioka C, et al. Competition between the Direct Exchange Interaction and Superexchange Interaction in Layered Compounds LiCrSe2, LiCrTe2, and NaCrTe2 with a Triangular Lattice. Inorg Chem. 2016;55(15):7407-13doi: 10.1021/acs.inorgchem.6b00610.
Kobayashi, S., Ueda, H., Michioka, C., & Yoshimura, K. (2016). Competition between the Direct Exchange Interaction and Superexchange Interaction in Layered Compounds LiCrSe2, LiCrTe2, and NaCrTe2 with a Triangular Lattice. Inorganic chemistry, 55(15), 7407-13. https://doi.org/10.1021/acs.inorgchem.6b00610
Kobayashi, Shintaro, et al. "Competition between the Direct Exchange Interaction and Superexchange Interaction in Layered Compounds LiCrSe2, LiCrTe2, and NaCrTe2 with a Triangular Lattice." Inorganic chemistry vol. 55,15 (2016): 7407-13. doi: https://doi.org/10.1021/acs.inorgchem.6b00610
Kobayashi S, Ueda H, Michioka C, Yoshimura K. Competition between the Direct Exchange Interaction and Superexchange Interaction in Layered Compounds LiCrSe2, LiCrTe2, and NaCrTe2 with a Triangular Lattice. Inorg Chem. 2016 Aug 01;55(15):7407-13. doi: 10.1021/acs.inorgchem.6b00610. Epub 2016 Jul 11. PMID: 27400024.
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Inorg Chem. 2016 Aug 01;55(15):7407-13. doi: 10.1021/acs.inorgchem.6b00610. Epub 2016 Jul 11.

Competition between the Direct Exchange Interaction and Superexchange Interaction in Layered Compounds LiCrSe2, LiCrTe2, and NaCrTe2 with a Triangular Lattice.

Inorganic chemistry

Shintaro Kobayashi, Hiroaki Ueda, Chishiro Michioka, Kazuyoshi Yoshimura

Affiliations

  1. Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
  2. Research Center for Low Temperature and Materials Sciences, Kyoto University , Kyoto 606-8501, Japan.

PMID: 27400024 DOI: 10.1021/acs.inorgchem.6b00610

Abstract

Physical properties of new S = 3/2 triangular-lattice compounds LiCrSe2, LiCrTe2, and NaCrTe2 have been investigated by X-ray diffraction and magnetic measurements. These compounds crystallize in the ordered NiAs-type structure, where alkali metal ions and Cr atoms stack alternately. Despite their isomorphic structures, magnetic properties of these three compounds are different; NaCrTe2 has an A-type spin structure with ferromagnetic layers, LiCrTe2 is likely to exhibit a helical spin structure, and LiCrSe2 shows a first-order-like phase transition from the paramagnetic trigonal phase to the antiferromagnetic monoclinic phase. In these compounds and the other chromium chalcogenides with a triangular lattice, we found a general relationship between the Curie-Weiss temperature and magnetic structures. This relation indicates that the competition between the antiferromagnetic direct d-d exchange interaction and the ferromagnetic superexchange interaction plays an important role in determining the ground state of chromium chalcogenides.

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