Magnetocaloric effect in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:msub><mml:mi mathvariant="normal">Ni</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant="normal">Pr</mml:mi></mml:mrow></mml:math>, Nd, Gd, Tb, Dy, Ho, Er) series
作者:P. J. von Ranke、M. A. Mota、D. F. Grangeia、A. Magnus G. Carvalho、F. C. G. Gandra、A. A. Coelho、A. Caldas、N. A. de Oliveira、S. Gama
DOI:10.1103/physrevb.70.134428
日期:——
In this paper, the magnetocaloric effect in the hexagonal intermetallic compounds belonging to the RNi5 series was calculated using a Hamiltonian including the crystalline electrical field, exchange interaction, and the Zeeman effect. Experimental work was performed and the two thermodynamics quantities, namely, isothermal entropy change and adiabatic temperature change were obtained for polycrystalline samples, using heat capacity measurements, and compared to the theoretical predictions.