Giant heat dissipation at the low temperature reversible-irreversible transition in Gd5Ge4
The heat exchanged at the low-temperature first-order magnetostructural transition is directly measured in Gd5Ge4 . Results show that the origin and the temperature dependence of the heat exchanged varies with the reversible/irreversible character of the first-order transition. In the reversible reg...
| Autores: | , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/10922 |
| Acesso em linha: | https://hdl.handle.net/2445/10922 |
| Access Level: | acceso abierto |
| Palavra-chave: | Propietats magnètiques Temperatures baixes Transformacions de fase (Física estadística) Equacions d'estat Magnetic properties Low temperatures Phase transformations (Statistical physics) Equations of state |
| Resumo: | The heat exchanged at the low-temperature first-order magnetostructural transition is directly measured in Gd5Ge4 . Results show that the origin and the temperature dependence of the heat exchanged varies with the reversible/irreversible character of the first-order transition. In the reversible regime, the heat exchanged by the sample is mostly due to the latent heat at the transition and decreases with decreasing temperature, while in the irreversible regime, the heat is irreversibly dissipated and increases strongly with decreasing temperature, reaching a value of 237 J/kg at 4 K. |
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