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Entanglement of charge transfer, hole doping, exchange interaction, and octahedron tilting angle and their influence on the conductivity of La1-xSrxFe0.75Ni0.25O3-delta: A combination of x-ray spectroscopy and diffraction | |
2010 | |
Source Publication | JOURNAL OF APPLIED PHYSICS
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ISSN | 0021-8979 |
Volume | 108Issue:12Pages:- |
Status | 已发表 |
DOI | 10.1063/1.3517822 |
Abstract | Substitution of La by Sr in the 25% Ni doped charge transfer insulator LaFeO3 leads to structural changes that inflect the electrical conductivity, which is caused by small polaron hopping via charge transfer and exchange interactions. The substitution forms electron holes and causes a structural transition from orthorhombic to rhombohedral symmetry, and then to cubic symmetry. The structural crossover is accompanied by a crossover from the Fe3+-O2--Fe3+ superexchange interaction to the Fe3+-O2--Fe4+ double exchange interaction in the course of substitution, as evidenced by a considerable increase in the conductivity at ambient temperature. The charge transfer and exchange interactions depend on the superexchange angle, which approaches 180 degrees upon increasing Sr concentration. An increase in superexchange angle leads to an increase in overlapping between the O 2p and the Fe/Ni 3d orbitals. (C) 2010 American Institute of Physics. ()[doi:10.1063/1.3517822] |
URL | 查看原文 |
Indexed By | SCI |
WOS Research Area | Physics |
WOS Subject | Physics, Applied |
WOS ID | WOS:000285768800136 |
Publisher | AMER INST PHYSICS |
WOS Keyword | ABSORPTION-SPECTROSCOPY ; TRANSPORT-PROPERTIES ; PHYSICAL-PROPERTIES ; PHASE-TRANSITION ; CATHODE MATERIAL ; PEROVSKITES ; LA1-XSRXFEO3 ; MANGANITES ; REFINEMENT ; BEHAVIOR |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/31106 |
Collection | 个人在本单位外知识产出 |
Corresponding Author | Erat, Selma |
Affiliation | 1.Empa Swiss Fed Labs Mat Sci & Technol, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland 2.ETH, Dept Mat, Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland 3.Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland 4.Ernest Orlando Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA 5.Tech Univ Bergakad Freiberg, D-09596 Freiberg, Germany |
Recommended Citation GB/T 7714 | Erat, Selma,Braun, Artur,Piamonteze, Cinthia,et al. Entanglement of charge transfer, hole doping, exchange interaction, and octahedron tilting angle and their influence on the conductivity of La1-xSrxFe0.75Ni0.25O3-delta: A combination of x-ray spectroscopy and diffraction[J]. JOURNAL OF APPLIED PHYSICS,2010,108(12):-. |
APA | Erat, Selma.,Braun, Artur.,Piamonteze, Cinthia.,Liu, Zhi.,Ovalle, Alejandro.,...&Gauckler, Ludwig J..(2010).Entanglement of charge transfer, hole doping, exchange interaction, and octahedron tilting angle and their influence on the conductivity of La1-xSrxFe0.75Ni0.25O3-delta: A combination of x-ray spectroscopy and diffraction.JOURNAL OF APPLIED PHYSICS,108(12),-. |
MLA | Erat, Selma,et al."Entanglement of charge transfer, hole doping, exchange interaction, and octahedron tilting angle and their influence on the conductivity of La1-xSrxFe0.75Ni0.25O3-delta: A combination of x-ray spectroscopy and diffraction".JOURNAL OF APPLIED PHYSICS 108.12(2010):-. |
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