Studies of remnant magnetoresistance in granular AuCo films

被引：1

作者：

Peleg, N ^{[1
]}

Gorodetsky, G ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 191卷 / 03期

基金：

以色列科学基金会;

关键词：

giant magnetoresistance; superparamagnetism; thin films; fine particles;

D O I：

10.1016/S0304-8853(98)00304-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The observation of remanence effects in the magnetoresistance of a granular Au0.82Co0.18 film is reported. The results obtained, at low temperatures and low magnetic fields, are analyzed on the basis of a simple model for remnant giant magnetoresistance. The comparison with similarly measured magnetization remanence, shows that mainly the small ferromagnetic Co particles, of volume V < 4.5 nm(3), account for the giant magnetoresistance (GMR). The novel approach applied here for analyzing the dominant particles size in GMR, could be used for ether granular magnetic materials as well. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：354 / 358

页数：5

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