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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1048| Magnetocaloric effect in Sm-Co2-xFex alloys | |
| LUIS ANDRES BURROLA GANDARA CARLOS ROBERTO SANTILLAN RODRIGUEZ JOSE ANDRES MATUTES AQUINO | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Magnetocaloric effect | |
| SmCo2 and SmFe2 magnetic cubic Laves phases have Curie temperatures of 220 and 669 K, respectively. Aiming to increase the Curie temperature of SmCo2 for potential room temperature magnetic refrigeration Co was partially replaced by Fe. The fundamental magnetic entropy change of the SmCo2 compound, ΔSM = 3.61 J/kg.K, for an applied magnetic field of μoH = 1.5 T was observed at TSR=175 K, where a spin reorientation transition occurs; furthermore a refrigerant capacity of 37 J/kg was calculated. Interestingly the addition of Fe practically suppressed the spin reorientation transition, shifting the magnetic entropy change maximum to the Curie temperature in the SmCo1.8Fe0.2 sample. The magnetic entropy change maximum at Curie temperature TC=300 K and the refrigerant capacity for the doped compound decreased to ΔSM=0.20 J/kg.K and 13.5 J/kg, respectively, for an applied magnetic field of μoH=1.5 T. After an homogenization heat treatment at 773K during 50 h, the SmCo1.8Fe0.2 compound showed an increase of the maximum magnetic entropy change, ΔSM=0.28 J/kg.K, and refrigerant capacity remains 13.5 J/kg, for an applied magnetic field of μoH=1.5T. | |
| 2012 | |
| Artículo | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos |
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