Spintronics in metal-insulator nanogranular magnetic thin films

被引：53

作者：

Fujimori, Hiroyasu ^{[1
]}

Ohnuma, Shigehiro ^{[1
]}

Kobayashi, Nobukiyo ^{[1
]}

Masumoto, Tsuyosi ^{[1
]}

机构：

[1] Res Inst Elect & Magnet Mat, Taihaku Ku, Sendai, Miyagi 9820807, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 304卷 / 01期

关键词：

nanogranular thin film; high-frequency permeability; tunnel-type magnetoresistance;

D O I：

10.1016/j.jmmm.2006.02.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic and electrical properties of metal-insulator nanogranular thin films are overviewed, from the spintronics point of view, by presenting our recent results. (1) The metal-rich ferromagnetic ones possess ultrahigh-frequency (MHz-GHz) permeabilities mu', mu '', mainly owing to large induced magnetic anisotropy field H-k. They are useful for various magnetic devices, such as thin-film inductors and noise suppressors. (2) The insulator-rich superpramagnetic ones exhibit tunnel-type magnetoresistance, being large in (Mg or Al)-fluoride base films. The Granular-In-Gap (GIG) devices with improved field sensitivity are useful for very low magnetic-field sensors. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：32 / 35

页数：4

共 45 条

[1] Finite-size effects in fine particles: magnetic and transport properties [J].

Batlle, X ;

Labarta, A .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2002, 35 (06) :R15-R42

[2] Emission of spin waves by a magnetic multilayer traversed by a current [J].

Berger, L .

PHYSICAL REVIEW B, 1996, 54 (13) :9353-9358

[3] Spin-dependent tunneling conductance of Fe|MgO|Fe sandwiches -: art. no. 054416 [J].

Butler, WH ;

Zhang, XG ;

Schulthess, TC ;

MacLaren, JM .

PHYSICAL REVIEW B, 2001, 63 (05)

[4] Giant magnetoresistance in insulating granular films and planar tunneling junctions [J].

Fujimori, H ;

Mitani, S ;

Takanashi, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 267 (02) :184-192

[5]

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

[6] STRUCTURE AND 100MHZ SOFT-MAGNETIC PROPERTIES IN MULTILAYERS AND GRANULAR THIN-FILMS [J].

FUJIMORI, H .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 33 (10-11) :1625-1636

[7] 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

[8]

FUJIMORI H, 1983, AMORPHOUS METALLIC A, pCH16

[9]

HIROTA E, 2001, GIANT MAGNETORESISTA

[10]

Hono K., 2002, MAGNETIC NANOSTRUCTU

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