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 PublicationJOURNAL OF APPLIED PHYSICS
ISSN0021-8979
Volume108Issue:12Pages:-
Status已发表
DOI10.1063/1.3517822
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]

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Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000285768800136
PublisherAMER INST PHYSICS
WOS KeywordABSORPTION-SPECTROSCOPY ; TRANSPORT-PROPERTIES ; PHYSICAL-PROPERTIES ; PHASE-TRANSITION ; CATHODE MATERIAL ; PEROVSKITES ; LA1-XSRXFEO3 ; MANGANITES ; REFINEMENT ; BEHAVIOR
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Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/31106
Collection个人在本单位外知识产出
Corresponding AuthorErat, 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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