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

Journal Article · Sat Jun 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4881502· OSTI ID:22304216

Jin, Chao; Li, Peng; Mi, Wenbo; Bai, Haili ^[1]

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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)

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.

• OSTI ID: 22304216
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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