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IOP Publishing, Journal of Physics D: Applied Physics, 24(45), p. 245001, 2012

DOI: 10.1088/0022-3727/45/24/245001

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Anisotropic magnetoresistance in polycrystalline La0.67(Ca1−xSrx)0.33MnO3

Journal article published in 2012 by Yiwei Liu, Zhihuan Yang, Huali Yang, Tao Zou, Yali Xie, Bin Chen, Young Sun ORCID, Qingfeng Zhan, Run-Wei Li
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This paper is available in a repository.

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Abstract

Abstract We investigated the anisotropic magnetoresistance (AMR) effects in polycrystalline La0.67(Ca1−x Sr x )0.33MnO3. An anomalously large AMR of 19.1% was observed near the metal–insulator transition temperature (T MI) in polycrystalline La0.67Ca0.33MnO3, but slight Sr doping could significantly depress the anomalous AMR around T MI. By studying the temperature, magnetic field, current direction dependence of AMR and the phase transition process, it was suggested that the anisotropic spin-polarized transport and the demagnetization effect together with the metamagnetic transition around T MI play important roles in the anomalous AMR effects in polycrystalline perovskite manganites.