Magnetocaloric effect due to spin reorientation in the crystalline electrical field: Theory applied to DyAl2

abstract

We report a way of obtaining the magnetocaloric effect due to the crystal electrical-field quenching of the total angular momentum in a magnetic system where a strong spin reorientation is present. The theoretical model is applied to DyAl2 and the results predict a considerable magnetic entropy change by rotating a single crystal in a fixed magnetic field. The obtained temperature and magnetic-field dependencies of the magnetization component along the < 111 >-crystallographic direction are in good agreement with the recently reported experimental data.

keywords

MAGNETIC REFRIGERANTS; TRANSITION; MNAS1-XSBX; GD-5(SI2GE2); ENTROPY

subject category

Physics

authors

von Ranke, PJ; de Oliveira, NA; Garcia, DC; de Sousa, VSR; de Souza, VA; Magnus, A; Carvalho, G; Gama, S; Reis, MS

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