Giant magnetocaloric and barocaloric effects in R5Si2Ge2 (R = Tb, Gd)

被引：14
作者：
de Oliveira, N. A. [1 ]
机构：
[1] Univ Estado Rio de Janeiro, Inst Fis Armando Dias Tavares, BR-20550013 Rio De Janeiro, RJ, Brazil
来源：
JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 03期
关键词：
ADIABATIC PRESSURE APPLICATION; COMPOUND; MODEL;
D O I：
10.1063/1.4776729
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, we theoretically discuss the magnetocaloric effect under applied pressure and the barocaloric effect in the compounds Gd5Si2Ge2 and Tb5Si2Ge2. For this purpose, we use a model of interacting localized magnetic moments, including the magnetoelastic coupling. Our calculations show that the barocaloric quantities, upon pressure variation from 0 to 2 kbar, in the compound Gd5Si2Ge2 exhibit the normal behavior with large values, in good agreement with the available experimental data. Moreover, our theoretical calculations predict that the barocaloric quantities in the compound Tb5Si2Ge2, upon pressure variation from 0 to 6 kbar, are large as well. (C) 2013 American Institute of Physics.[http://dx.doi.org/10.1063/1.4776729]
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页数：5
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共 26 条
[1]   Giant magnetocaloric and barocaloric effects in Mn(As1-xSbx) [J].
de Medeiros, L. G., Jr. ;
de Oliveira, N. A. ;
Troper, A. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 501 (02) :177-182
[2]   Magnetocaloric and barocaloric effects in Mn(As0.7Sb0.3) [J].
de Medeiros, L. G., Jr. ;
de Oliveira, N. A. ;
Troper, A. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2010, 322 (9-12) :1558-1560
[3]   Barocaloric and magnetocaloric effects in La(Fe0.89Si0.11)13 [J].
de Medeiros, L. G., Jr. ;
de Oliveira, N. A. ;
Troper, A. .
JOURNAL OF APPLIED PHYSICS, 2008, 103 (11)
[4]   Magnetocaloric effect under applied pressure and the barocaloric effect in the compounds RCo2 (R = Er, Ho and Dy) [J].
de Oliveira, N. A. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (17)
[5]   Entropy change upon magnetic field and pressure variations [J].
de Oliveira, N. A. .
APPLIED PHYSICS LETTERS, 2007, 90 (05)
[6]   Barocaloric effect and the pressure induced solid state refrigerator [J].
de Oliveira, N. A. .
JOURNAL OF APPLIED PHYSICS, 2011, 109 (05)
[7]   Theoretical aspects of the magnetocaloric effect [J].
de Oliveira, N. A. ;
von Ranke, P. J. .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2010, 489 (4-5) :89-159
[8]   Direct measurement of the "giant" adiabatic temperature change in Gd5Si2Ge2 [J].
Giguère, A ;
Foldeaki, M ;
Gopal, BR ;
Chahine, R ;
Bose, TK ;
Frydman, A ;
Barclay, JA .
PHYSICAL REVIEW LETTERS, 1999, 83 (11) :2262-2265
[9]   Magnetocaloric effect in (Gd1-cTbc)5Si2Ge2 [J].
Gomes, M. B. ;
de Oliveira, N. A. ;
von Ranke, P. J. ;
Troper, A. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (24) :4006-4009
[10]   Recent developments in magnetocaloric materials [J].
Gschneidner, KA ;
Pecharsky, VK ;
Tsokol, AO .
REPORTS ON PROGRESS IN PHYSICS, 2005, 68 (06) :1479-1539
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