Coulomb blockade effects on magnetoresistance of granular magnetic media

被引：7

作者：

Jalil, MBA ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Informat Storage Mat Lab, Singapore 119260, Singapore

来源：

JOURNAL OF APPLIED PHYSICS | 2002年 / 91卷 / 10期

关键词：

D O I：

10.1063/1.1450847

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A full Monte Carlo simulation is performed of the magnetotransport across a granular system of Co nanoparticles, embedded in an insulating Al2O3 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. (C) 2002 American Institute of Physics.

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页码：7628 / 7630

页数：3

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