Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 43, Issue 38, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/43/38/385001
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Funding
- National Science Foundation of China [50672064]
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Polycrystalline and epitaxial NixFe3-xO4 (0 <= x <= 1.03) thin films were fabricated by reactively co-sputtering Fe and Ni targets in a mixed Ar + O-2 atmosphere, and the structure, magnetic and magnetotransport properties were investigated systematically. The saturation magnetization and resistivity can be tuned over a wide range. The room-temperature saturation magnetization for the polycrystalline thin films decreases linearly with x from 440 to 230 emu cm(-3), due to Ni substitution. For the epitaxial thin films, the saturation magnetization and the resistivity can be tuned in the range 195-340 emu cm(-3) and 10(-4)-10(-2) Omega m by Ni substitution and the introduction of Fe vacancies, because both Ni substitution and Fe vacancies can influence the charge carrier density and the double exchange on the B sublattice.
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