Temperature dependence of magnetoresistance effect in Ag-Fe3O4 composites films
Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
272
Pages
1772-1773
Date Issued
2004
Author(s)
Abstract
We have observed an anomalous magnetoreisistance effect in Ag x-(Fe3O4)1-x composite films. A positive MR value is found at small values of x. As the temperature is decreased, the positive MR ratio becomes significantly larger and appears with a wider range of x. The thermal influence on magneto-transport behavior in Agx-(Fe3O4)1-x composite films confirms that the spin injection from Fe3O4 into Ag granules induces spin accumulation in Ag granules and thus impede the current causing a larger resistance under a field. © 2003 Elsevier B.V. All rights reserved.
Type
journal article