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Type: Artigo de periódico
Title: Theoretical investigation on the existence of inverse and direct magnetocaloric effect in perovskite EuZrO3
Author: Alho, BP
Nobrega, EP
de Sousa, VSR
Carvalho, AMG
de Oliveira, NA
von Ranke, PJ
Abstract: We report on the magnetic and magnetocaloric effect calculations in antiferromagnetic perovskite-type EuZrO3. The theoretical investigation was carried out using a model Hamiltonian including the exchange interactions between nearest-neighbor and next-nearest-neighbor for the antiferromagnetic ideal G-type structure (the tolerance factor for EuZrO3 is t = 0.983, which characterizes a small deformation from an ideal cubic perovskite). The molecular field approximation and Monte Carlo simulation were considered and compared. The calculated magnetic susceptibility is in good agreement with the available experimental data. For a magnetic field change from zero to 2 T a normal magnetocaloric effect was calculated and for a magnetic field change from zero to 1 T, an inverse magnetocaloric effect was predicted to occur below T = 3.6 K. (C) 2011 American Institute of Physics. [doi:10.1063/1.3582144]
Country: EUA
Editor: Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1063/1.3582144
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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