Magnetocaloric effect in random magnetic anisotropy materials
In this letter we report the results of entropy variations in random anisotropy magnets composed of TbxY1-xAl2, with x=0.15, 0.20, 0.25, 0.35, 0.40, and 0.50. We discovered large entropy variation associated with the spin glass to paramagnetictransition. Both temperature transition and entropy chang...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2002 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:116255 |
| Acceso en línea: | https://ddd.uab.cat/record/116255 https://dx.doi.org/urn:doi:10.1063/1.1506777 |
| Access Level: | acceso abierto |
| Palabra clave: | Entropy Glass transitions Magnetic anisotropy Magnetic materials Curie point Magnetocaloric effect Paramagnetism Spin glass models |
| Sumario: | In this letter we report the results of entropy variations in random anisotropy magnets composed of TbxY1-xAl2, with x=0.15, 0.20, 0.25, 0.35, 0.40, and 0.50. We discovered large entropy variation associated with the spin glass to paramagnetictransition. Both temperature transition and entropy changes were studied at different temperatures and with different compositions. Our conclusion is that these materials are suitable candidates for use as magnetic refrigerants in a temperature range below 40 K. |
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