Theoretical investigations on magnetocaloric effect in Er1-yTbyAl2 series

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:379

Article

Ribeiro, P. O.¹  Alho, B. P.¹  Alvarenga, T. S. T.¹  Nobrega, E. P.¹  de Sousa, V. S. R.¹  Carvalho, A. Magnus G.²  Caldas, A.³  de Oliveira, N. A.¹  von Ranke, P. J.¹ 

[1] Univ Estado Rio de Janeiro UERJ, Inst Fis, BR-20550013 Rio De Janeiro, RJ, Brazil

[2] CNPEM, Lab Nacl Luz Sincrotron, BR-13033970 Campinas, SP, Brazil

[3] SUESC, BR-20211351 Rio De Janeiro, RJ, Brazil

关键词: Magnetocaloric effect;    Magnetic refrigeration;    Crystalline electrical field;   

DOI  :  10.1016/j.jmmm.2014.12.023

来源: Elsevier

【 摘 要 】

We report on the magnetic and magnetocaloric effect calculations in rare earth Er1-yTbyAl2 compounds (y=0.00, 0.25, 0.5, 0.75 and 1.00). Our model Hamiltonian has contributions of the crystalline electrical field anisotropy in both Er and Tb magnetic sublattices, disorder in exchange interactions among Er Er, Tb-Tb and Er-Tb magnetic ions and the Zeeman effect. The magnetization, the isothermal entropy change (Delta ST) and the adiabatic temperature change (Delta T-ad) dependence on temperature were simulated and, compared with the experimental data available. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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