| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1804085 | Journal of Magnetism and Magnetic Materials | 2007 | 5 Pages |
Abstract
The coexistence of large positive and negative low-field magnetoresistance (LFMR) in the ferromagnetic La0.7Ca0.3MnO3 thin films with ordered microcrack (MC) distributions is reported. For the films with the highest linear density of MC, the negative LFMR can be up to â60% and rapidly changes to the positive value of 25% at 200Â Oe field with the increase of temperature. We discuss the effect based on the spin-polarized tunneling and inhomogeneous magnetic state induced by the natural formations of MC in the films.
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Condensed Matter Physics
Authors
Shaojiang Zhu, Fuchang Zhang, Jie Yuan, Beiyi Zhu, Bo Xu, Lixin Cao, Xianggang Qiu, Bairu Zhao,