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Magnetic field dependence of the maximum adiabatic temperature changeстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Kuzmin M.D., Skokov K.P., Karpenkov D.Yu, Moore J.D., Richter M., Gutfleisch O.
- Журнал: Applied Physics Letters
- Том: 99
- Номер: 1
- Год издания: 2011
- Издательство: AIP Publishing
- Местоположение издательства: United States
- DOI: 10.1063/1.3607279
- Аннотация: The field dependence of the maximum magnetocaloric ОґT-effect in ferromagnets with second-order phase transitions is studied by way of direct measurements. All studied materials are found to follow the formula ОґTmax = A (H + H 0)2/3 - AH0 2/3, where A and H0 are constants and H is the internal magnetic field. It is essential to distinguish the latter from external field Hext. The dependence of ОґTmax on Hext is qualitatively distinct, the difference being particularly pronounced in the low-field region. In the field range relevant to applications (0.1-2 T), ОґTmax follows a linear dependence on H2/3. It is proposed to use the slope of this dependence as a figure of merit of magnetic refrigerants. В© 2011 American Institute of Physics.
- Добавил в систему: Карпенков Дмитрий Юрьевич