Devitrification of the low temperature magnetic-glass state in Gd5Ge4

被引：49

作者：

Roy, S. B. ^{[1
]}

Chattopadhyay, M. K.

Banerjee, A.

Chaddah, P.

Moore, J. D.

Perkins, G. K.

Cohen, L. F.

Gschneidner, K. A., Jr.

Pecharsky, V. K.

机构：

[1] Raja Ramanna Ctr Adv Technol, Magnet & Superconducting Mat Sect, Indore 452013, India

[2] UGC, DAE, Consortium Sci Res, Indore 452017, India

[3] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

[4] US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA

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

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.75.184410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The first-order antiferromagnetic to ferromagnetic phase transition in Gd5Ge4 becomes arrested at low temperatures in a certain range of applied magnetic fields. This effect gives rise to a low temperature magnetic-glass state in Gd5Ge4. Here we report results of dc magnetization measurements investigating the static and dynamic magnetic properties of this low temperature magnetic-glass state. The process of devitrification (or de-arrest) of this magnetic glass is studied by varying both magnetic field and temperature. This devitrification process has quite distinct and separate signatures compared to the process of the magnetic-glass formation. Furthermore, the results of our experimental study support the recently introduced phenomenological idea of correlation between the supercooling of the antiferromagnetic phase and the kinetic arrest of the antiferromagnetic to ferromagnetic phase transition.

引用

页数：7

共 28 条

[1]

AVARAMI M, 1940, J CHEM PHYS, V7, P212

[2] Granulation, Phase Change, and Microstructure - Kinetics of Phase Change. III [J].

Avrami, M .

JOURNAL OF CHEMICAL PHYSICS, 1941, 9 (02) :177-184

[3] Ferromagnetic ground state of the robust charge-ordered manganite Pr0.5Ca0.5MnO3 obtained by minimal Al substitution [J].

Banerjee, A. ;

Mukherjee, K. ;

Kumar, Kranti ;

Chaddah, P. .

PHYSICAL REVIEW B, 2006, 74 (22)

[4]

CALLISTER WC, 2005, MAT SCI ENG

[5] Giant heat dissipation at the low-temperature reversible-irreversible transition in Gd5Ge4 -: art. no. 172402 [J].

Casanova, F ;

Labarta, A ;

Batlle, X .

PHYSICAL REVIEW B, 2005, 72 (17)

[6]

CHADDAH P, CONDMAT0601095

[7] Kinetic arrest of the first-order ferromagnetic-to-antiferromagnetic transition in Ce(Fe0.96Ru0.04)2:: Formation of a magnetic glass -: art. no. 180401 [J].

Chattopadhyay, MK ;

Roy, SB ;

Chaddah, P .

PHYSICAL REVIEW B, 2005, 72 (18)

[8] Metastable magnetic response across the antiferromagnetic to ferromagnetic transition in Gd5Ge4 -: art. no. 214421 [J].

Chattopadhyay, MK ;

Manekar, MA ;

Pecharsky, AO ;

Pecharsky, VK ;

Gschneidner, KA ;

Moore, J ;

Perkins, GK ;

Bugoslavsky, YV ;

Roy, SB ;

Chaddah, P ;

Cohen, LF .

PHYSICAL REVIEW B, 2004, 70 (21) :1-6

[9] Dynamic phase separation in La5/8-yPryCa3/8MnO3 -: art. no. 184425 [J].

Ghivelder, L ;

Parisi, F .

PHYSICAL REVIEW B, 2005, 71 (18)

[10]

Johnson WA, 1939, T AM I MIN MET ENG, V135, P416

← 1 2 3 →