Structural and magnetic properties of Al doped Co-Ag granular films:: temperature dependence of magnetoresistance

被引：7

作者：

Öksüzoglu, RM ^{[1
]}

Elmali, A

Henn, R

Fuess, H

Hahn, H

机构：

[1] Univ Selcuk, Dept Phys, Fac Sci & Art, TR-42031 Konya, Turkey

[2] Ankara Univ, Dept Engn Phys, Fac Engn, TR-06100 Ankara, Turkey

[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[4] Tech Univ Darmstadt, Inst Sci Mat, D-64287 Darmstadt, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 279卷 / 2-3期

关键词：

magneto resistance; magnetic properties of heterostructures; structural properties; sputtering;

D O I：

10.1016/j.jmmm.2004.01.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The correlation between the structure, the magnetic and magnetotransport properties of sputter-deposited (Co90Al10)(x)Ag100-x granular films (19 less than or equal to x less than or equal to 45) are investigated. For an (Co90Al10) content of about 28% the magneto resistance (MR) ratio of the films reach its highest value of 6%. Al doping reduces the MR ratio in CoAg films, however, leads to a almost constant MR ratio against post annealing up to 773 K in (Co90Al10)(28)Ag-72 granular films, although the film structure is affected by annealing, respectively. According to magnetization measurements, superparamagnetic cobalt grains in the as-deposited (Co90Al10)(28)Ag-72 sample show after annealing up to 773 K both superparamagnetic and ferromagnetic behaviour. Annealing at 823 K causes a domain formation of large ferromagnetic grains with strong correlation. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：202 / 209

页数：8

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