Negative magnetoresistance produced by Hall fluctuations in a ferromagnetic domain structure

被引：7

作者：

Barabash, SV ^{[1
]}

Stroud, D ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1392978

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a model for a negative magnetoresistance (MR) that would develop in a material with many ferromagnetic domains even if the individual domains have no magnetoresistance and even if there is no boundary resistance. The negative MR is due to a classical current-distortion effect arising from spatial variations in the Hall conductivity, combined with a change in domain structure due to an applied magnetic field. The negative MR can exceed 1000% if the product of the carrier relaxation time and the internal magnetic field due to spontaneous magnetization is sufficiently large. (C) 2001 American Institute of Physics.

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页码：979 / 981

页数：3

相关论文

共 11 条

[1] PHYSICAL-PROPERTIES OF MACROSCOPICALLY INHOMOGENEOUS-MEDIA [J].

BERGMAN, DJ ;

STROUD, D .

SOLID STATE PHYSICS: ADVANCES IN RESEARCH AND APPLICATIONS, VOL 46, 1992, 46 :147-269

[2] MAGNETORESISTANCE IN MAGNETIC MANGANESE OXIDE WITH INTRINSIC ANTIFERROMAGNETIC SPIN STRUCTURE [J].

CHAHARA, K ;

OHNO, T ;

KASAI, M ;

KOZONO, Y .

APPLIED PHYSICS LETTERS, 1993, 63 (14) :1990-1992

[3] MAGNETORESISTANCE PEAKS IN THE NEIGHBORHOOD OF COERCIVITY IN MAGNETOOPTICAL RECORDING MEDIA [J].

HAJJAR, RA ;

MANSURIPUR, M .

JOURNAL OF APPLIED PHYSICS, 1992, 72 (04) :1528-1538

[4] 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

[5]

Landau LD, 1984, ELECTRODYNAMICS CONT

[6] Resistance of a domain wall in La0.7Ca0.3MnO3 [J].

Mathur, ND ;

Littlewood, PB ;

Todd, NK ;

Isaac, SP ;

Teo, BS ;

Kang, DJ ;

Tarte, EJ ;

Barber, ZH ;

Evetts, JE ;

Blamire, MG .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (11) :6287-6290

[7] Temperature and magnetic field dependent transport anisotropies in La0.7Ca0.3MnO3 films [J].

O'Donnell, J ;

Eckstein, JN ;

Rzchowski, MS .

APPLIED PHYSICS LETTERS, 2000, 76 (02) :218-220

[8] GIANT NEGATIVE MAGNETORESISTANCE IN PEROVSKITELIKE LA2/3BA1/3MNOX FERROMAGNETIC-FILMS [J].

VONHELMOLT, R ;

WECKER, J ;

HOLZAPFEL, B ;

SCHULTZ, L ;

SAMWER, K .

PHYSICAL REVIEW LETTERS, 1993, 71 (14) :2331-2333

[9] Low-field magnetoresistance anisotropy in ultrathin Pr0.67Sr0.33MnO3 films grown on different substrates [J].

Wang, HS ;

Li, Q ;

Liu, K ;

Chien, CL .

APPLIED PHYSICS LETTERS, 1999, 74 (15) :2212-2214

[10] Strain-induced large low-field magnetoresistance in Pr0.67Sr0.33MnO3 ultrathin films [J].

Wang, HS ;

Li, Q .

APPLIED PHYSICS LETTERS, 1998, 73 (16) :2360-2362