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Title: Coulomb blockade effects on magnetoresistance of granular magnetic media
Authors: Jalil, M.B.A. 
Issue Date: 15-May-2002
Citation: Jalil, M.B.A. (2002-05-15). Coulomb blockade effects on magnetoresistance of granular magnetic media. Journal of Applied Physics 91 (10 I) : 7628-7630. ScholarBank@NUS Repository.
Abstract: A full Monte Carlo simulation is performed of the magnetotransport across a granular system of Co nanoparticles, embedded in an insulating Al 2O 3 matrix. The interplay between spin-dependent tunneling and Coulomb blockade effects is modeled using the so-called "orthodox" theory of single-charge tunneling. The tunneling magnetoresistance ratio (TMR) shows a strong temperature dependence, especially for the case of nonmagnetic contact electrodes. This behavior contradicts previous predictions by Inoue and Maekawa [Phys. Rev. B 53, 11927 (1996)], and can be explained by considering the crucial role of the initial rate-determining tunneling step. © 2002 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.1450847
Appears in Collections:Staff Publications

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