The effect of remanence on the magnetoresistance in CrO2 powder compacts

被引：4

作者：

Ding, BJ ^{[1
]}

Ju, S

Li, ZY

机构：

[1] Suzhou Univ, Dept Phys, Suzhou 215006, Peoples R China

[2] CCAST, World Lab, Beijing 100080, Peoples R China

[3] Zhenjiang Coll, Dept Phys, Zhenjiang 212003, Peoples R China

来源：

PHYSICS LETTERS A | 2006年 / 353卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.physleta.2005.12.103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this Letter, the effect of remanence on the magnetoresistance in chromium dioxides (CrO2) powder compacts is studied within the framework of two-channel model. The temperature dependence of the conductance and magnetoresistance is examined and the results are in good agreement with experimental data. (c) 2006 Elsevier B.V. All rights reserved.

引用

收藏

页码：349 / 354

页数：6

相关论文

共 19 条

[1] 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

[2] Powder magnetoresistance (invited) [J].

Coey, JMD .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :5576-5581

[3] Characterization of the natural barriers of intergranular tunnel junctions:: Cr2O3 surface layers on CrO2 nanoparticles [J].

Dai, JB ;

Tang, JK ;

Xu, HP ;

Spinu, L ;

Wang, WD ;

Wang, KY ;

Kumbhar, A ;

Li, M ;

Diebold, U .

APPLIED PHYSICS LETTERS, 2000, 77 (18) :2840-2842

[4] Junction-like magnetoresistance of intergranular tunneling in field-aligned chromium dioxide powders [J].

Dai, JB ;

Tang, JK .

PHYSICAL REVIEW B, 2001, 63 (05)

[5] Temperature dependence of the conductance and magnetoresistance of CrO2 powder compacts -: art. no. 064410 [J].

Dai, JB ;

Tang, JK .

PHYSICAL REVIEW B, 2001, 63 (06)

[6] Temperature dependence of the interfacial spin polarization of La2/3Sr1/3MnO3 -: art. no. 052403 [J].

Garcia, V ;

Bibes, M ;

Barthélémy, A ;

Bowen, M ;

Jacquet, E ;

Contour, JP ;

Fert, A .

PHYSICAL REVIEW B, 2004, 69 (05)

[7] Coulomb blockade versus intergrain resistance in colossal magnetoresistive manganite granular films [J].

García-Hernández, M ;

Guinea, F ;

de Andrés, A ;

Martínez, JL ;

Prieto, C ;

Vázquez, L .

PHYSICAL REVIEW B, 2000, 61 (14) :9549-9552

[8]

GLAZMAN LI, 1988, ZH EKSP TEOR FIZ+, V94, P332

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

HELMAN, JS ;

ABELES, B .

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

[10] Enhanced intergrain tunneling magnetoresistance in half-metallic CrO2 films [J].

Hwang, HY ;

Cheong, SW .

SCIENCE, 1997, 278 (5343) :1607-1609