Half-metallicity, magnetic moments, and gap states in oxygen-deficient magnetite for spintronic applications

被引:35
作者
Arras, R. [1 ]
Calmels, L. [1 ]
Warot-Fonrose, B. [1 ]
机构
[1] Univ Toulouse, CEMES CNRS, F-31055 Toulouse 4, France
关键词
ELECTRONIC-STRUCTURE; FILMS; VACANCIES; FE3O4; PARAMETERS; DEPOSITION; ANISOTROPY;
D O I
10.1063/1.3678028
中图分类号
O59 [应用物理学];
学科分类号
摘要
The electronic structure near oxygen vacancies in half-metallic magnetite has been calculated using first principles methods. Oxygen vacancies are responsible for the existence of gap states occupied by majority and minority spin electrons. We discuss whether these defects modify the spin magnetic moments, the magnetization, the magnetic coupling between Fe ions, and the half-metallic behaviour of magnetite. These results, which contribute to remove stumbling blocks to magnetite-based spintronic devices, could be useful to analyze the conductivity, the magnetotransport and magnetic properties, the electron and optical spectra of actual magnetite electrodes. (C) 2012 American Institute of Physics. [doi:10.1063/1.3678028]
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页数:3
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