| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1805383 | Journal of Magnetism and Magnetic Materials | 2006 | 5 Pages |
Abstract
The magnetotransport properties in nanostructured La2/3Sr1/3MnO3 powder compacts prepared under different pressure (0.4-4Â GPa) have been examined. For all samples, high field magnetoresistance (HFMR) effect weakens at T>130K, and there exists Coulomb blockade at T<60K. An increase in the preparation pressure results in systematic changes in the various features. These include a decrease in grain size, a reduction in low-field magnetoresistance (LFMR) within the whole experimental temperature, an enhancement of HFMR at T<200K, and a decrease of HFMR at T>200K. The surface phase and the link condition in grain boundaries are suggested to be responsible for the present observations.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
Yan-Kun Tang, Yu Sui, Da-Peng Xu, Zheng-Nan Qian, Wen-Hui Su,