Artículo
The influence of magnetocrystalline anisotropy on the magnetocaloric effect: A case study on Co 2B
Autor/es | Fries, M
Skokov, Konstantin P. Karpentov, Dmitriy Franco García, Victorino Ener, S Gutfleisch, O |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2016 |
Fecha de depósito | 2018-04-02 |
Resumen | The influence of magnetocrystalline anisotropy on the magnetocaloric effect (MCE) was studied on single crystals of CoB and compared to measurements on polycrystalline samples. Large differences in adiabatic temperature ... The influence of magnetocrystalline anisotropy on the magnetocaloric effect (MCE) was studied on single crystals of CoB and compared to measurements on polycrystalline samples. Large differences in adiabatic temperature change Δ T a d and magnetic entropy change Δ S M were found along the different crystallographic directions. The magnetocaloric effect differs by 40% in the case of Δ T a d in a field change of 1.9 T when applying the field along the hard axis and easy plane of magnetization. In the case of Δ S M, the values differ 50% and 35% from each other in field changes of 1 and 1.9 T, respectively. It was found that this anisotropy effect does not saturate in fields up to 4 T, which is higher than the anisotropy field of CoB ( ≈2 T). A simple model was developed to illustrate the possible effect on magnetocrystalline anisotropy, showing large differences especially in application relevant fields of about 1 T. The results strongly suggest that the MCE could be maximized when orienting single crystalline powders in an easy axis parallel to the applied field in active magnetocaloric regenerator structures, and therefore the overall device efficiency could be increased. |
Identificador del proyecto | FP7/2007-2013
No. 310748 A/13/09434 MAT2013-45165-P MAT2016-77265-R No. K4-2015-013 |
Cita | Fries, M., Skokov, K.P., Karpentov, D., Franco García, V., Ener, S. y Gutfleisch, O. (2016). The influence of magnetocrystalline anisotropy on the magnetocaloric effect: A case study on Co 2B. Applied Physics Letters, 109, 1-6. |
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