Spontaneous resistivity anisotropy and band structure of La0.7Ca0.3MnO3 and Fe3O4 films

被引：81

作者：

Ziese, M ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.62.1044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spontaneous resistivity anisotropy of La0.7Ca0.3MnO3 and Fe3O4 films was measured as a function of temperature for various current and magnetic field directions. The anisotropic magnetoresistance was analyzed within the two-current model substituted by a calculation within an atomic state model. The magnetoresistance of La0.7Ca0.3MnO3 indicates that only majority electrons conduct current, whereas at least two bands of majority and minority character, respectively, contribute to the magnetotransport properties of Fe3O4 films. This finding is consistent with the small spin-polarization values observed for magnetite.

引用

页码：1044 / 1050

页数：7

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