MAGNETORESISTANCE OF AG/CO70FE30 LAYERED AND GRANULAR STRUCTURES

被引：17

作者：

REDON, O

PIERRE, J

RODMACQ, B

MEVEL, B

DIENY, B

机构：

[1] CNRS,LAB LOUIS NEEL,F-38042 GRENOBLE,FRANCE

[2] CEN GRENOBLE,CEA,DEPT RECH FONDAMENTALE MAT CONDENSEE,F-38054 GRENOBLE 9,FRANCE

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1995年 / 149卷 / 03期

关键词：

D O I：

10.1016/0304-8853(95)00314-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetoresistance and magnetization measurements were performed on sputtered Ag/CoFe multilayers, with various CoFe and Ag thicknesses. For thicknesses larger than 6 Angstrom, CoFe layers are continuous. The amplitude Delta(rho/rho o) of the giant magnetoresistance (GMR) is maximum around 7 Angstrom of CoFe and 12 Angstrom of Ag, reaching 30% in 700 Oe at room temperature and 100% at 4.2 K. For lower CoFe thicknesses, the magnetic layers break into oblate particles. These particles exhibit a superparamagnetic behaviour and the system a 'granular-like' magnetoresistance. Magnetization and magnetoresistance behaviours have been modelized in each case, introducing bilinear and biquadratic exchange couplings in multilayer systems, or the size distribution and interactions of the particles in granular multilayers.

引用

收藏

页码：398 / 408

页数：11

相关论文

共 21 条

[1] GIANT MAGNETORESISTANCE OF (001)FE/(001) CR MAGNETIC SUPERLATTICES [J].

BAIBICH, MN ;

BROTO, JM ;

FERT, A ;

VANDAU, FN ;

PETROFF, F ;

EITENNE, P ;

CREUZET, G ;

FRIEDERICH, A ;

CHAZELAS, J .

PHYSICAL REVIEW LETTERS, 1988, 61 (21) :2472-2475

[2] NOVEL MAGNETORESISTANCE EFFECT IN LAYERED MAGNETIC-STRUCTURES - THEORY AND EXPERIMENT [J].

BARNAS, J ;

FUSS, A ;

CAMLEY, RE ;

GRUNBERG, P ;

ZINN, W .

PHYSICAL REVIEW B, 1990, 42 (13) :8110-8120

[3] 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

[4] OSCILLATING INTERLAYER COUPLING OF (111) CO/CU1-XNIX SPUTTERED MULTILAYERS [J].

BOBO, JF ;

HENNET, L ;

PIECUCH, M .

EUROPHYSICS LETTERS, 1993, 24 (02) :139-144

[5] MEASUREMENTS OF PARTICLE-SIZE DISTRIBUTION PARAMETERS IN FERROFLUIDS [J].

CHANTRELL, RW ;

POPPLEWELL, J ;

CHARLES, SW .

IEEE TRANSACTIONS ON MAGNETICS, 1978, 14 (05) :975-977

[6] GIANT NEGATIVE MAGNETORESISTANCE IN GRANULAR FERROMAGNETIC SYSTEMS [J].

CHIEN, CL ;

XIAO, JQ ;

JIANG, JS .

JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :5309-5314

[7] MACROSCOPIC QUANTUM TUNNELING OF THE MAGNETIC-MOMENT (INVITED) [J].

CHUDNOVSKY, EM .

JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :6697-6702

[8] STRUCTURAL, MAGNETIC AND TRANSPORT-PROPERTIES OF NIFEXAG(1-X) HETEROGENEOUS ALLOYS [J].

DIENY, B ;

TEIXEIRA, SR ;

RODMACQ, B ;

COWACHE, C ;

AUFFRET, S ;

REDON, O ;

PIERRE, J .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 130 (1-3) :197-215

[9] 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

[10] GIANT MAGNETORESISTANCE AT LOW FIELDS IN DISCONTINUOUS NIFE-AG MULTILAYER THIN-FILMS [J].

HYLTON, TL ;

COFFEY, KR ;

PARKER, MA ;

HOWARD, JK .

SCIENCE, 1993, 261 (5124) :1021-1024