Título

Transformation behavior and magnetocaloric effect in Mn1−xCrxCoGe (x = 0.04 and 0.11) melt-spun ribbons tailored by heat treatment

Autor

GERARDO DANIEL PÉREZ

JOSE LUIS SANCHEZ LLAMAZARES

Pablo Álvarez-Alonso

CESAR FIDEL SANCHEZ VALDES

ARIS QUINTANA NEDELCOS

Nivel de Acceso

En Embargo

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Identificador alterno

doi: https://doi.org/10.1016/j.jmmm.2017.08.016

Materias

MnCrCoGe melt-spun ribbons - (AUTOR) Martensitic transformation - (AUTOR) Magnetostructural transition - (AUTOR) Magnetocaloric effect - (AUTOR) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) FÍSICA - (CTI) FÍSICA - (CTI)

Resumen o descripción

"Recently, MnNiGe and MnCoGe intermetallic compounds have received a considerable attention due to the coupled tunable martensitic and magnetic transitions as well as giant magnetocaloric effect (MCE) they exhibit. In this work, by doping with Cr and varying of the annealing regime, a merged magnetostructural transition between a ferromagnetic orthorhombic and a paramagnetic hexagonal structure was received near room temperature in Mn1−xCrxCoGe melt-spun ribbons with x = 0.04 and 0.11. Structural and magnetic characterizations have been performed by X-ray diffraction, differential scanning calorimetry and magnetization measurements. It is found that, in ribbons with x = 0.04 (0.11) annealed at 1148 K, the peak value of the magnetic entropy change and the refrigerant capacity through the orthorhombic to hexagonal transition strongly increase with the annealing time from 7.3 (9.4) Jkg−1 K−1 to 10.6 (13.7) Jkg−1 K−1 and from 182 (235) Jkg−1 to 214 (267) Jkg−1, respectively, at 5 T for the time increase from 4 h to 8 h. Compared to bulk alloys of similar composition, the fabricated melt-spun ribbons show much broader working temperature range and a higher cooling efficiency."

Editor

Elsevier B.V.

Fecha de publicación

diciembre de 2017

Tipo de publicación

Artículo

Versión de la publicación

Versión aceptada

Recurso de información

http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/1666

Formato

application/pdf

Sugerencia de citación

Gerardo Daniel-Pérez, J.L. Sánchez Llamazares, P. Alvarez-Alonso, C.F. Sánchez-Valdés, R. Varga, V. Chernenko, A. Quintana-Nedelcos, Transformation behavior and magnetocaloric effect in Mn1−xCrxCoGe (x=0.04 and 0.11) melt-spun ribbons tailored by heat treatment, Journal of Magnetism and Magnetic Materials, Volume 444, 2017, Pages 263-269.

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Repositorio IPICYT

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