Artículo
Effect of α-Fe impurities on the field dependence of magnetocaloric response in LaFe11.5Si1.5
Autor/es | Blázquez Gámez, Javier Sebastián
Moreno Ramírez, Luis Miguel Ipus Bados, Jhon Jairo Kiss, László Ferenc Kaptás, Dénes Kemèny, Tamás |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2015 |
Fecha de depósito | 2023-06-05 |
Publicado en |
|
Resumen | In this work, the theoretical field dependence of the magnetic entropy change far away from the transition is used to analyze the field dependence of composite materials formed by fcc La(Fe,Si)13 and bcc α-Fe(Si) phases. ... In this work, the theoretical field dependence of the magnetic entropy change far away from the transition is used to analyze the field dependence of composite materials formed by fcc La(Fe,Si)13 and bcc α-Fe(Si) phases. A non-interacting phases approximation is followed in the analysis and results are in good agreement with microstructural data obtained from X-ray diffraction and Mössbauer spectroscopy. The range of validity of the approximation is estimated. It is concluded that the quadratic field dependence of magnetic entropy change is reached a few tens of kelvin above the transition temperature at 1.5 T. However, the linear dependence (characteristic of ferromagnets well below its Curie temperature) is only reached a few hundred kelvin below the transition. The results presented here can be used in the deconvolution of the contribution of impurities to the MCE signal in composites. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Hungarian Scientific Research Fund (OTKA) |
Identificador del proyecto | MAT2013-45165-P
K 101456 |
Cita | Blázquez Gámez, J.S., Moreno Ramírez, L.M., Ipus Bados, J.J., Kiss, L.F., Kaptás, D. y Kemèny, T. (2015). Effect of α-Fe impurities on the field dependence of magnetocaloric response in LaFe11.5Si1.5. Journal of Alloys and Compounds, 646, 101-105. https://doi.org/10.1016/j.jallcom.2015.06.085. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
Effect of -Fe impurities.pdf | 760.5Kb | [PDF] | Ver/ | |