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

被引：74

作者：

Morellon, L ^{[1
]}

Ritter, C

Magen, C

Algarabel, PA

Ibarra, MR

机构：

[1] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[3] CSIC, E-50009 Zaragoza, Spain

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.68.024417

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of the application of an external magnetic field in the paramagnetic phase of the giant magnetocaloric compound Tb5Si2Ge2 has been studied by means of macroscopic (magnetostriction and magnetoresistance) and microscopic neutron powder diffraction experiments. As a main result, we have discovered the existence of a ferromagnetic monoclinic phase in these intriguing 5:4 compounds. Long-range ferromagnetism sets in within the monoclinic structure on cooling down before the structural transformation into the orthorhombic phase takes place. Our results may shed some light into understanding the complex coupling between crystallographic and magnetic degrees of freedom and the mechanisms that trigger the field-induced processes in the Tb-5(SixGe1-x)(4) compounds.

引用

页数：6

共 30 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] The nonpareil R5(SixGe1-x)4 phases [J].

Gschneidner, KA ;

Pecharsky, VK ;

Pecharsky, AO ;

Ivtchenko, VV ;

Levin, EM .

JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 303 :214-222

[3]

Huang H, 2002, AIP CONF PROC, V614, P11, DOI 10.1063/1.1472520

[4]

Ivtchenko V.V., 2000, ADV CRYOGEN ENG, V46, P405

[5] 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

[6]

LEVIN EM, 2001, PHYS REV B, V63

[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] 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

[10] Magnetic-field-induced structural phase transition in Gd5(Si1.8Ge2.2) [J].

Morellon, L ;

Algarabel, PA ;

Ibarra, MR ;

Blasco, J ;

García-Landa, B ;

Arnold, Z ;

Albertini, F .

PHYSICAL REVIEW B, 1998, 58 (22) :R14721-R14724

← 1 2 3 →