Temperature and magnetic field dependent transport anisotropies in La0.7Ca0.3MnO3 films
Temperature and magnetic field dependent transport anisotropies in La0.7Ca0.3MnO3 films
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DOI：
10.1063/1.125707
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发表时间：
2000
影响因子：
4
通讯作者：
J. O'Donnell;J. Eckstein;M. Rzchowski
中科院分区：
文献类型：
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作者：
J. O'Donnell;J. Eckstein;M. Rzchowski
我们报告了巨型磁阻锰矿 La0.7Ca0.3MnO3 的全应变四方薄膜中各向异性磁阻 (AMR) 的温度和磁场依赖性。 AMR 的行为与传统金属合金中的行为非常不同。其大小在居里温度TC附近达到峰值，并在低温时变小。它有两个不同的对称分量：一个关于 TC 附近占主导地位的输运电流方向二重对称，另一个与晶体的对称轴四重对称，出现在低温下。
We report the temperature and field dependence of anisotropic magnetoresistance (AMR) in fully strained tetragonal thin films of the colossal magnetoresistance manganite La0.7Ca0.3MnO3. The behavior of the AMR is very different from that found in conventional metallic alloys. Its magnitude is peaked near the Curie temperature TC and becomes small at low temperature. It has two distinct symmetry components: one twofold symmetric about the transport current direction dominant near TC, the other fourfold symmetric with symmetry axes of the crystal, appearing at low temperature.