Phenomenological theory of the giant magnetoresistance of superparamagnetic particles

被引：78

作者：

Wiser, N ^{[1
]}

机构：

[1] BAR ILAN UNIV,DEPT PHYS,RAMAT GAN,ISRAEL

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1996年 / 159卷 / 1-2期

关键词：

giant magnetoresistance; granular sample; superparamagnetism;

D O I：

10.1016/0304-8853(95)00613-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A phenomenological theory is presented for the magnetic field dependence of the magnetoresistance (MR) of a granular sample containing very small superparamagnetic particles embedded in a nonmagnetic host. It is found that if the particles are present in a range of sizes, then MR varies almost linearly with the magnetization. The calculated magnetic field dependence of MR is in excellent agreement with recent data for a melt-spun granular sample of CuCo.

引用

收藏

页码：119 / 124

页数：6

相关论文

共 10 条

[1] GIANT MAGNETORESISTANCE IN HETEROGENEOUS CU-CO ALLOYS [J].

BERKOWITZ, AE ;

MITCHELL, JR ;

CAREY, MJ ;

YOUNG, AP ;

ZHANG, S ;

SPADA, FE ;

PARKER, FT ;

HUTTEN, A ;

THOMAS, G .

PHYSICAL REVIEW LETTERS, 1992, 68 (25) :3745-3748

[2] A RESISTOR NETWORK THEORY OF THE GIANT MAGNETORESISTANCE IN MAGNETIC SUPERLATTICES [J].

EDWARDS, DM ;

MATHON, J ;

MUNIZ, RB .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) :3548-3552

[3] MAGNETIC PROPERTIES OF GRANULAR NICKEL FILMS [J].

GITTLEMAN, JI ;

GOLDSTEIN, Y ;

BOZOWSKI, S .

PHYSICAL REVIEW B-SOLID STATE, 1972, 5 (09) :3609-+

[4] EFFECT OF MAGNETIC-INTERACTIONS AND MULTIPLE MAGNETIC PHASES ON THE GIANT MAGNETORESISTANCE OF HETEROGENEOUS COBALT-SILVER THIN-FILMS [J].

GREGG, JF ;

THOMPSON, SM ;

DAWSON, SJ ;

OUNADJELA, K ;

STADDON, CR ;

HAMMAN, J ;

FERMON, C ;

SAUX, G ;

OGRADY, K .

PHYSICAL REVIEW B, 1994, 49 (02) :1064-1072

[5] SUPERPARAMAGNETISM IN MELT-SPUN CUCO GRANULAR SAMPLES [J].

HICKEY, BJ ;

HOWSON, MA ;

MUSA, SO ;

TOMKA, GJ ;

RAINFORD, BD ;

WISER, N .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 147 (03) :253-259

[6] GIANT MAGNETORESISTANCE FOR SUPERPARAMAGNETIC PARTICLES - MELT-SPUN GRANULAR CUCO [J].

HICKEY, BJ ;

HOWSON, MA ;

MUSA, SO ;

WISER, N .

PHYSICAL REVIEW B, 1995, 51 (01) :667-669

[7]

Jacobs I. S., 1963, MAGNETISM, P271, DOI DOI 10.1016/B978-0-12-575303-6.50013-0

[8] EXCHANGE INTERACTIONS AND GIANT MAGNETORESISTANCE IN MAGNETIC MULTILAYERS [J].

MATHON, J .

CONTEMPORARY PHYSICS, 1991, 32 (03) :143-156

[9] MAGNETORESISTANCE IN A GRANULAR FE-MG SYSTEM [J].

PETTIT, K ;

KITA, E ;

ARAGA, K ;

TASAKI, A ;

SALAMON, MB .

JOURNAL OF APPLIED PHYSICS, 1994, 75 (10) :6918-6920

[10] GIANT MAGNETORESISTANCE IN NONMULTILAYER MAGNETIC SYSTEMS [J].

XIAO, JQ ;

JIANG, JS ;

CHIEN, CL .

PHYSICAL REVIEW LETTERS, 1992, 68 (25) :3749-3752