ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Recently a great deal of attention has been focused on giant magnetoresistance (GMR), especially in the coupled multilayer magnetic films. In this report, we show that GMR also exists in nanocomposite films. We have systematically studied the magnetoresistance of Fe/Ag and Co/Ag nanocomposite films with 15 to 55 at. % of Fe and Co, respectively. These films were prepared by magnetron sputtering from composite targets. The crystallite size of the Fe and Co are from 30 to 150 A(ring) which was controlled by the substrate temperature and determined by the analysis of the x-ray diffraction patterns. All samples have a negative magnetoresistance and the change of magnetoresistance varies from a fraction of a percent to more than 25% at 6 K and under 5 Tesla magnetic field. We have investigated the effect of the particle size and particle separation distance on the magnetoresistance and their magnetic properties will be presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.353641
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