| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1621465 | Journal of Alloys and Compounds | 2010 | 4 Pages |
Abstract
Nanocrystalline, granular samples of La0.7Ca0.3MnO3 (LCMO) were synthesized by reactive milling method and annealed at various temperatures. Effect of grain size on the low-field magnetoresistance (LFMR) has been investigated. Based upon a phenomenological model taking into account the spin-polarized transport across grain boundaries, we explained magnetic field dependence of magnetoresistance in LCMO samples. The contribution to the magnetoresistance coming from spin-polarized tunneling was separated out from the intergranular contribution. The fitted results showed that the temperature dependence of the LFMR displays a Curie–Weiss law-like behavior.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
D.H. Manh, P.T. Phong, T.D. Thanh, L.V. Hong, N.X. Phuc,