Tunnel-type GMR in Co-Al-O insulated granular system - Its oxygen-concentration dependence

被引：66

作者：

Fujimori, H ^{[1
]}

Mitani, S ^{[1
]}

Ohnuma, S ^{[1
]}

机构：

[1] RES INST ELECT & MAGNET MAT,SENDAI,MIYAGI 982,JAPAN

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1996年 / 156卷 / 1-3期

关键词：

D O I：

10.1016/0304-8853(95)00880-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co-Al-O thin films, with network-like nano granular structure consisting of Co based magnetic and metallic grains and Al2O3 based nonmetallic intergrains, were fabricated by Ar + O-2 reactive sputtering. Giant magnetoresistances (GMR) were observed. From the experiments on oxygen concentration dependence of GMR, electrical resistivity and microstructure, it was confirmed that spin dependent tunneling was responsible for the GMRs.

引用

收藏

页码：311 / 314

页数：4

相关论文

共 15 条

[1] PERCOLATION CONDUCTIVITY IN W-AL2O3 GRANULAR METAL-FILMS [J].

ABELES, B ;

PINCH, HL ;

GITTLEMAN, JI .

PHYSICAL REVIEW LETTERS, 1975, 35 (04) :247-250

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

CHIEN, CL ;

XIAO, JQ ;

JIANG, JS .

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

[3] HIGH ELECTRICAL-RESISTIVITY BEHAVIOR OF FE-BASED AND CO-BASED SOFT-MAGNETIC HETEROGENEOUS ALLOYS [J].

FUJIMORI, H ;

MITANI, S ;

OHNUMA, S ;

IKEDA, T ;

SHIMA, T ;

MASUMOTO, T .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1994, 181 (pt 2) :897-901

[4]

FUJIMORI H, 1994, IEEE T MAGN, V30, P4779, DOI 10.1109/20.334219

[5] TUNNEL-TYPE GMR IN METAL-NONMETAL GRANULAR ALLOY THIN-FILMS [J].

FUJIMORI, H ;

MITANI, S ;

OHNUMA, S .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1995, 31 (1-2) :219-223

[6]

FUJIMORI H, 1994, IN PRESS P ACT MET C

[7] Giant magnetoresistance in magnetic layered and granular materials [J].

Levy, PM .

SOLID STATE PHYSICS - ADVANCES IN RESEARCH AND APPLICATIONS, VOL 47, 1994, 47 :367-462

[8] ELECTRON-TUNNELING BETWEEN FERROMAGNETIC-FILMS [J].

MAEKAWA, S ;

GAFVERT, U .

IEEE TRANSACTIONS ON MAGNETICS, 1982, 18 (02) :707-708

[9] CHARACTERISTIC HIGH-FIELD DEPENDENCE OF MAGNETORESISTANCE IN FE/AG GRANULAR THIN-FILMS FABRICATED BY SPUTTERING AND ANNEALING [J].

MAKHLOUF, SA ;

SUMIYAMA, K ;

SUZUKI, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1994, 33 (9A) :4913-4918

[10] HIGH ELECTRICAL-RESISTIVITY AND MOSSBAUER-EFFECT OF SOFT-MAGNETIC FE-SIO2 GRANULAR ALLOYS [J].

MITANI, S ;

FUJIMORI, H ;

FURUKAWA, S ;

OHNUMA, S .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 140 :429-430