Tunneling magnetoresistance in granular films made of well-defined Co clusters embedded in an inert-gas matrix

被引：19

作者：

Holdenried, M ^{[1
]}

Micklitz, H ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

来源：

EUROPEAN PHYSICAL JOURNAL B | 2000年 / 13卷 / 02期

关键词：

D O I：

10.1007/s100510050025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present a new tunneling magnetoresistance(TMR) system. Granular films consisting of well-defined ferromagnetic Co clusters embedded in insulating inert-gas matrices Kr and Xe have been prepared by the co-deposition of in-beam prefabricated Co clusters and inert-gas atoms. Experiments show that the resistance of these films clearly follows an exp(C/T-1/2)-law and reveal a tunneling magnetoresistance (TMR) of about 7% at 10 K. The TMR is found to be only weakly temperature dependent and independent of the tunneling barrier.

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页码：205 / 208

页数：4

相关论文

共 23 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] 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] ENHANCED MAGNETORESISTANCE IN LAYERED MAGNETIC-STRUCTURES WITH ANTIFERROMAGNETIC INTERLAYER EXCHANGE [J].

BINASCH, G ;

GRUNBERG, P ;

SAURENBACH, F ;

ZINN, W .

PHYSICAL REVIEW B, 1989, 39 (07) :4828-4830

[4] Magnetoresistance of chromium dioxide powder compacts [J].

Coey, JMD ;

Berkowitz, AE ;

Balcells, L ;

Putris, FF ;

Barry, A .

PHYSICAL REVIEW LETTERS, 1998, 80 (17) :3815-3818

[5] Tunnel-type GMR in Co-Al-O insulated granular system - Its oxygen-concentration dependence [J].

Fujimori, H ;

Mitani, S ;

Ohnuma, S .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 156 (1-3) :311-314

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

GITTLEMAN, JI ;

GOLDSTEIN, Y ;

BOZOWSKI, S .

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

[7] TUNNELING OF SPIN-POLARIZED ELECTRONS AND MAGNETORESISTANCE IN GRANULAR NI FILMS [J].

HELMAN, JS ;

ABELES, B .

PHYSICAL REVIEW LETTERS, 1976, 37 (21) :1429-1432

[8] Tunneling giant magnetoresistance in Fe-SiO2 multilayered and alloyed films [J].

Honda, S ;

Okada, T ;

Nawate, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1997, 165 (1-3) :153-156

[9] Theory of tunneling magnetoresistance in granular magnetic films [J].

Inoue, J ;

Maekawa, S .

PHYSICAL REVIEW B, 1996, 53 (18) :11927-11929

[10] THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS [J].

JIN, S ;

TIEFEL, TH ;

MCCORMACK, M ;

FASTNACHT, RA ;

RAMESH, R ;

CHEN, LH .

SCIENCE, 1994, 264 (5157) :413-415