Step-edge magnetoresistance in La0.7Ca0.3MnO3 films

被引：67
作者：
Ziese, M [1 ]
Heydon, G
Höhne, R
Esquinazi, P
Dienelt, J
机构：
[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
[2] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England
[3] Univ Leipzig, Dept Superconduct & Magnetism, D-04103 Leipzig, Germany
[4] Inst Surface Modificat, D-04318 Leipzig, Germany
来源：
APPLIED PHYSICS LETTERS | 1999年 / 74卷 / 10期
关键词：
D O I：
10.1063/1.123587
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetoresistance of step-edge structures in La0.7Ca0.3MnO3 films was investigated. Step- edge arrays with 200 steps of height 140-200 nm and step separation 20 mu m along [110] were fabricated on LaAlO3 substrates by chemically assisted ion-beam etching. Thin La0.7Ca0.3MnO3 films were deposited on the structured substrates by pulsed-laser deposition. Measurements of the large low-field magnetoresistance, the dynamic conductance, and the anisotropic magnetoresistance lead to the proposal of a model of spin-polarized tunneling in a ferromagnet/spin-glass/ferromagnet geometry. (C) 1999 American Institute of Physics. [S0003-6951(99)04410-1].
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页码：1481 / 1483
页数：3
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