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Title: Structure, magnetic, and transport properties of epitaxial ZnFe{sub 2}O{sub 4} films: An experimental and first-principles study

We investigated the structure, magnetic, and transport properties of ZnFe{sub 2}O{sub 4} (ZFO) by both experimental and first-principles study. The epitaxial ZFO films prepared with various oxygen partial pressures show clear semiconducting behavior and room-temperature ferrimagnetism. A large magnetoresistance of −21.2% was observed at 75 K. The room-temperature ferrimagnetism is induced by the cation disordering. The calculated results indicate that under cation disordering, the ZFO with various oxygen vacancies is a half-metal semiconductor with both possible positive and negative signs of the spin polarization, while ZFO with no oxygen vacancies is an insulator and can be acted as the spin filter layer in spintronic devises.
Authors:
; ; ;  [1]
  1. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Institute of Advanced Materials Physics, Faculty of Science, Tianjin University, Tianjin 300072 (China)
Publication Date:
OSTI Identifier:
22304216
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPUTERIZED SIMULATION; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; EPITAXY; FERRIMAGNETISM; FERRITES; FILMS; LAYERS; MAGNETIC PROPERTIES; MAGNETORESISTANCE; METALS; PARTIAL PRESSURE; SEMICONDUCTOR MATERIALS; SPIN ORIENTATION; TEMPERATURE RANGE 0273-0400 K; ZINC COMPOUNDS