Magnetic properties and rnicrostructural characterization of granular Ag-Fe films

被引：6

作者：

Arranz, MA ^{[1
]}

Andrés, JP ^{[1
]}

De Toro, JA ^{[1
]}

Paje, SE ^{[1
]}

de la Torre, MAL ^{[1
]}

Riveiro, JM ^{[1
]}

机构：

[1] Univ Castilla La Mancha, Dept Fis Aplicada, Fac Ciencias Quim, E-13071 Ciudad Real, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 242卷

关键词：

granular system; magnetoresistance giant; superparamagnetism; grain size; intergranular interactions; Joule heating;

D O I：

10.1016/S0304-8853(01)01309-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetization and magnetotransport properties of Ag Fe granular films have been investigated with hysteresis cycles and DC resistivity measurements under applied magnetic fields up to 1.5 T, The samples, grown by RF Sputtering. comprised iron clusters embedded in silver matrix whose grain size dependence on the sputtering, power has been extracted From the magnetization curves. The behaviour of the magnetoresistance as a function of the sputtering power, displaying a maximum around 60 W. is discussed in the frame of two competing magnetic scattering mechanisms. Besides. the capahility of Joule heating to modify the microstructure of these granular samples is shown in the magnetoresistance results. These results confirm the development of enhanced magnetic correlations amongst the enlarged iron clusters. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：952 / 954

页数：3

共 9 条

[1] Magnetic properties and giant magnetoresistance of melt-spun granular Cu-100-x-Co-x alloys [J].

Allia, P ;

Knobel, M ;

Tiberto, P ;

Vinai, F .

PHYSICAL REVIEW B, 1995, 52 (21) :15398-15411

[2] 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

[3] GRANULAR COBALT IN A METALLIC MATRIX [J].

CHILDRESS, JR ;

CHIEN, CL .

JOURNAL OF APPLIED PHYSICS, 1991, 70 (10) :5885-5887

[4] Influence of the distribution of magnetic moments on the magnetization and magnetoresistance in granular alloys [J].

Ferrari, EF ;

daSilva, FCS ;

Knobel, M .

PHYSICAL REVIEW B, 1997, 56 (10) :6086-6093

[5] Investigation of static and dynamic magnetic properties of Joule heated granular Co10Cu90 ribbons [J].

Fiorani, D ;

Testa, AM ;

Agostinelli, E ;

Imperatori, P ;

Caciuffo, R ;

Rinaldi, D ;

Tiberto, P ;

Vinai, F ;

Allia, P .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 202 (01) :123-132

[6] Giant magnetoresistance and superparamagnetic grains in Co-Ag granular films [J].

Honda, S ;

Nawate, M ;

Tanaka, M ;

Okada, T .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (02) :764-771

[7]

WAGN JQ, 1993, PHYS REV B, V47, P8341

[8] TRANSITION-METAL GRANULAR SOLIDS - MICROSTRUCTURE, MAGNETIC-PROPERTIES, AND GIANT MAGNETORESISTANCE [J].

WANG, JQ ;

XIAO, G .

PHYSICAL REVIEW B, 1994, 49 (06) :3982-3996

[9]

XIAO JQ, 1992, PHYS REV LETT, V68, P37496

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