Enhanced granular magnetoresistance due to ferromagnetic layers |
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| Authors: | J BaloghM Csontos D KaptásG Mihály |
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| Institution: | a Research Institute for Solid State Physics and Optics, P.O. Box 49, 1525 Budapest, Hungary
b Department of Physics, Budapest University of Technology and Economics, and “Electron Transport in Solids” Research Group of the Hungarian Academy of Sciences, Budafoki út 8, F epulet, 1111 Budapest, Hungary |
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| Abstract: | Giant magnetoresistance (GMR) of sequentially evaporated Fe-Ag structures has been investigated. Direct experimental evidence is given, showing that inserting ferromagnetic layers into a granular structure significantly enhances the magnetoresistance. The increase in the GMR effect is attributed to spin polarization effects. The large enhancement (up to more than a fourfold value) and the linear variation of the GMR in low magnetic fields are explained by scattering of the spin polarized conduction electrons on paramagnetic grains. |
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| Keywords: | 75 47 De 76 80 +y |
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