Anisotropy of the magnetoresistance in Gd5Si2Ge2 -: art. no. 237203

被引：34

作者：

Tang, H

Pecharsky, VK ^{[1
]}

Samolyuk, GD

Zou, M

Gschneidner, KA

Antropov, VP

Schlagel, DL

Lograsso, TA

机构：

[1] Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[3] Iowa State Univ, Ames Lab, Condensed Matter Phys Program, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.93.237203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The observed magnetoresistance of single crystalline Gd5Si2Ge2 is negative and strongly anisotropic. The absolute values measured along the [100] and [010] directions exceed those parallel to the [001] direction by more than 60%. First principles calculations demonstrate that a structural modification is responsible for the anisotropy of the magnetoresistance, and that the latter is due to a significant reduction of electronic velocity in the [100] direction and the anisotropy of electrical conductivity.

引用

收藏

页码：237203 / 1

页数：4

相关论文

共 23 条

[1] Making and breaking covalent bonds across the magnetic transition in the giant magnetocaloric material Gd5(Si2Ge2) [J].

Choe, W ;

Pecharsky, VK ;

Pecharsky, AO ;

Gschneidner, KA ;

Young, VG ;

Miller, GJ .

PHYSICAL REVIEW LETTERS, 2000, 84 (20) :4617-4620

[2] CALCULATION OF MAGNETOOPTICAL PROPERTIES FOR 4F SYSTEMS - LSDA PLUS HUBBARD-U RESULTS [J].

HARMON, BN ;

ANTROPOV, VP ;

LIECHTENSTEIN, AI ;

SOLOVYEV, IV ;

ANISIMOV, VI .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1995, 56 (11) :1521-1524

[3] Transformations in the Gd5(Si1.95Ge2.05) alloy induced by the temperature and magnetic-field cycling through the first-order magnetic-martensitic phase transition -: art. no. 064426 [J].

Levin, EM ;

Pecharsky, AO ;

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW B, 2001, 63 (06)

[4] Magnetic-field and temperature dependencies of the electrical resistance near the magnetic and crystallographic first-order phase transition of Gd-5(Si2Ge2) [J].

Levin, EM ;

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW B, 1999, 60 (11) :7993-7997

[5] Magnetic field and temperature-induced first-order transition in Gd5(Si1.5Ge2.5):: a study of the electrical resistance behavior [J].

Levin, EM ;

Pecharsky, VK ;

Gschneidner, KA ;

Tomlinson, P .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2000, 210 (1-3) :181-188

[6] Pressure-induced three-dimensional ferromagnetic correlations in the giant magnetocaloric compound Gd5Ge4 -: art. no. 207202 [J].

Magen, C ;

Arnold, Z ;

Morellon, L ;

Skorokhod, Y ;

Algarabel, PA ;

Ibarra, MR ;

Kamarad, J .

PHYSICAL REVIEW LETTERS, 2003, 91 (20)

[7] Magnetoelastic behaviour of Gd5Ge4 [J].

Magen, C ;

Morellon, L ;

Algarabel, PA ;

Marquina, C ;

Ibarra, MR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (14) :2389-2397

[8] Nature of the first-order antiferromagnetic-ferromagnetic transition in the Ge-rich magnetocaloric compounds Gd5(SixGe1-x)4 [J].

Morellon, L ;

Blasco, J ;

Algarabel, PA ;

Ibarra, MR .

PHYSICAL REVIEW B, 2000, 62 (02) :1022-1026

[9] Magnetic-martensitic transition of Tb5Si2Ge2 studied with neutron powder diffraction -: art. no. 024417 [J].

Morellon, L ;

Ritter, C ;

Magen, C ;

Algarabel, PA ;

Ibarra, MR .

PHYSICAL REVIEW B, 2003, 68 (02)

[10] Giant magnetoresistance near the magnetostructural transition in Gd5(Si1.8Ge2.2) [J].

Morellon, L ;

Stankiewicz, J ;

García-Landa, B ;

Algarabel, PA ;

Ibarra, MR .

APPLIED PHYSICS LETTERS, 1998, 73 (23) :3462-3464