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Influence of La and Ce additions on the magnetocaloric effect of Fe–B–Cr-based amorphous alloys.

Opened Access Influence of La and Ce additions on the magnetocaloric effect of Fe–B–Cr-based amorphous alloys.

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Autor: Franco García, Victorino
Law, Jiayan
Ramanujan, Raju Vijayaraghavan
Departamento: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Fecha: 2011
Publicado en: Applied Physics Letters, 98 (192503)
Tipo de documento: Artículo
Resumen: The magnetic entropy change SM , temperature of peak SM Tpk and refrigerant capacity RC in Fe RE 80B12Cr8 RE=La, Ce, or Gd alloys were studied. Increasing La, Ce, and Gd content led to relatively constant, decrease, and increase in Tpk, respectively. Both the phenomenologically constructed universal curve for SM and field dependence power laws demonstrated that these alloys exhibited similar critical exponents at Curie temperature. With 5% Ce added to Fe80B12Cr8, Tpk could be tuned near room temperature with relatively constant peak SM. Fe79B12Cr8La1 exhibited enhanced RC compared to Gd5Si2Ge1.9Fe0.1. The tunable Tpk and enhanced RC are needed in active magnetic regenerators.
Tamaño: 520.4Kb
Formato: PDF

URI: http://hdl.handle.net/11441/33599

DOI: http://dx.doi.org/10.1063/1.3589353

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