2017年
G-type antiferromagnetic order in the metallic oxide LaCu3Cr4O12
Physical Review B
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- 巻
- 95
- 号
- 4
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.95.041109
- 出版者・発行元
- AMER PHYSICAL SOC
The A-site-ordered cubic perovskite LaCu3Cr4O12, where a partial Cu-Cr intersite charge transfer transition occurs at T-CT = 220 K, was found to be an unconventional metallic and G-type antiferromagnetic oxide. Neutron powder diffraction revealed a G-type antiferromagnetic ordering at the Cr sites and no ordered moments at the Cu sites. Ab initio electronic structure calculations revealed that the narrowing of the Cr-O-Cr bands due to heavy tilting of the CrO6 octahedra and the strong hybridization of the Cu-3d, Cr-3d, and O-2p orbitals near the Fermi level give an unusual electronic structure in the vicinity of a localized-electron regime. The G-type magnetic structure is primarily stabilized by nearest-neighbor antiferromagnetic superexchange interactions of the near-localized Cr spins. The ferromagnetic {1 1 1} layers of the G-type antiferromagnetic Cr-spin sublattice allow the spin-polarized electron transfer through the strongly hybridized Cu orbitals.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.95.041109
- ISSN : 2469-9950
- eISSN : 2469-9969
- ORCIDのPut Code : 34692234
- Web of Science ID : WOS:000392281500003
- ORCIDで取得されたその他外部ID : a:1:{i:0;a:1:{s:8:"other-id";s:19:"WOS:000392281500003";}}