Large magnetocaloric effect and refrigerant capacity near room temperature in as-cast Gd5Ge2Si2-xSnx compounds

被引：8

作者：

Carvalho, A. Magnus G. ^{[1
,2
]}

Tedesco, J. C. G. ^{[3
]}

Pires, M. J. M. ^{[4
]}

Soffner, M. E. ^{[5
]}

Guimaraes, A. O. ^{[5
]}

Mansanares, A. M. ^{[3
]}

Coelho, A. A. ^{[3
]}

机构：

[1] Univ Fed Sao Paulo UNIFESP, Inst Ciencia & Tecnol, BR-12231280 Sao Jose Dos Campos, SP, Brazil

[2] Inst Nacl Metrol Qualidade & Tecnol INMETRO, BR-25250020 Duque De Caxias, RJ, Brazil

[3] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

[4] Univ Fed Vales Jequitinhonha & Mucuri, ICT, BR-39100000 Diamantina, MG, Brazil

[5] Univ Estadual Norte Fluminense Darcy Ribeiro UENF, Lab Ciencias Fis, BR-28013602 Campos Dos Goytacazes, RJ, Brazil

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 19期

基金：

巴西圣保罗研究基金会;

关键词：

GD5SI2GE2; ALLOYS;

D O I：

10.1063/1.4806971

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large values of isothermal entropy change (Delta S-T) and refrigerant capacity have been found in Gd5Ge2Si2-xSnx compounds. Values of the order of 20 J kg(-1) K-1 for -Delta S-T were obtained in as-cast samples when submitted to a magnetic field variation of 2 T. First-order-magneto-structural transition is induced by the substitution of silicon by tin and it is shifted to lower temperatures with the tin content. It means that the magnetocaloric effect on this series can be properly tuned to a specific practical thermodynamic cycle, including near room temperature range. (C) 2013 AIP Publishing LLC.

引用

页数：4

共 19 条

[1]

Alves Cleber Santiago, 2004, Mat. Res., V7, P535, DOI 10.1590/S1516-14392004000400005

[2] Phase control studies in Gd5Si2Ge2 giant magnetocaloric compound [J].

Belo, J. H. ;

Pereira, A. M. ;

Ventura, J. ;

Oliveira, G. N. P. ;

Araujo, J. P. ;

Tavares, P. B. ;

Fernandes, L. ;

Algarabel, P. A. ;

Magen, C. ;

Morellon, L. ;

Ibarra, M. R. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2012, 529 :89-95

[3] Magnetocaloric effect and transport properties of Gd5Ge2(Si1-xSnx)2 (x=0.23 and 0.40) compounds [J].

Campoy, J. C. P. ;

Plaza, E. J. R. ;

Nascimento, F. C. ;

Coelho, A. A. ;

Pereira, M. C. ;

Fabris, J. D. ;

Raposo, M. T. ;

Cardoso, L. P. ;

Persiano, A. I. C. ;

Gama, S. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 316 (02) :368-371

[4] Experimental study of the magnetocaloric effect in Gd5Sn2Si2 compound [J].

Campoy, JCP ;

Plaza, EJR ;

Carvalho, AMG ;

Coelho, AA ;

Gama, S ;

von Ranke, PJ .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 :2375-2376

[5] The isothermal variation of the entropy (ΔST) may be miscalculated from magnetization isotherms in some cases: MnAs and Gd5Ge2Si2 compounds as examples [J].

Carvalho, A. Magnus G. ;

Coelho, A. A. ;

von Ranke, P. J. ;

Alves, C. S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (08) :3452-3456

[6] Magnetocaloric materials [J].

Gschneidner, KA ;

Pecharsky, VK .

ANNUAL REVIEW OF MATERIALS SCIENCE, 2000, 30 :387-429

[7] Magnetocaloric properties and magnetic refrigerant capacity of MnFeP1-xSix [J].

Katagiri, K. ;

Nakamura, K. ;

Wada, H. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 553 :286-290

[8] Very large refrigerant capacity at room temperature with reproducible magnetocaloric effect in Fe0.975Ni0.025Rh [J].

Manekar, Meghmalhar ;

Roy, S. B. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2011, 44 (24)

[9] The giant magnetocaloric effect of optimally prepared Gd5Si2Ge2 [J].

Pecharsky, AO ;

Gschneidner, KA ;

Pecharsky, VK .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (08) :4722-4728

[10] Giant magnetocaloric effect in Gd-5(Si2Ge2) [J].

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW LETTERS, 1997, 78 (23) :4494-4497

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