Magnetocaloric effect in nanostructured Pr2Fe17 and Nd2Fe17 synthesized by high-energy ball-milling
"Nanocrystalline Pr2Fe17 and Nd2Fe17 powders with rhombohedral Th2Zn17-type crystal structure and average particle sizes around 20 nm have been obtained by high-energy ball milling While the bulk alloys show a well-defined and sharp drop in the low-field magnetization curve at the Curie tempera...
| Autores: | , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | México |
| Institución: | Instituto Potosino de Investigación Científica y Tecnológica |
| Repositorio: | Repositorio Institucional del IPICYT |
| Idioma: | inglés |
| OAI Identifier: | oai:ipicyt.repositorioinstitucional.mx:1010/1145 |
| Acceso en línea: | http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/1145 |
| Access Level: | acceso embargado |
| Palabra clave: | info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 |
| Sumario: | "Nanocrystalline Pr2Fe17 and Nd2Fe17 powders with rhombohedral Th2Zn17-type crystal structure and average particle sizes around 20 nm have been obtained by high-energy ball milling While the bulk alloys show a well-defined and sharp drop in the low-field magnetization curve at the Curie temperature, T-C = 285 K (Pr) and 335 K (Nd), the ball-milled samples exhibit a substantial broadening of the ferro-to-paramagnetic transition due to a considerable augmentation of the disordered inter-grain boundaries The latter results in an increase of more than 25% in the values of the full width at half maximum of the temperature dependence of the magnetic entropy change maintaining almost unchanged the relative cooling power" |
|---|