Giant magnetoresistance in granular Fe SiO2 films

B. Zhao and X. Yan

Physica A: Statistical Mechanics and its Applications, 1997, vol. 241, issue 1, 367-376

Abstract: We studied resistivity, magnetoresistivity and magnetization in granular Fe SiO2 films. In the hopping region, magnetoresistance was found to be as large as −5%, and is isotropic for different measurement geometry, which is the signature of giant magnetoresistance due to a spin-dependent conduction process. Temperature dependence of magnetoresistance could be described qualitatively but not quantitatively by two specific spin-dependent tunnelling models. We found that resistivity ϱ changes five orders of magnitude by altering measurement temperature, annealing temperature or metal volume fraction, and that magnetoresistivity -Δϱ increases with ϱ monotonously.

Keywords: Granular films; Giant magnetoresistance; Magnetization resistivity; Spin-dependent tunneling (search for similar items in EconPapers)
Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:241:y:1997:i:1:p:367-376

DOI: 10.1016/S0378-4371(97)00109-X

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