Artículo
Correction of the Shape Effect on Magnetic Entropy Change in Ball Milled Fe70Zr30 Alloys
Autor/es | Manchón Gordón, Alejandro F.
Ipus Bados, Jhon Jairo Moreno Ramírez, Luis Miguel Blázquez Gámez, Javier Sebastián Conde Amiano, Clara Francisca Franco García, Victorino Conde Amiano, Alejandro |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2018 |
Fecha de depósito | 2023-06-14 |
Publicado en |
|
Resumen | The field dependence of the magnetic entropy change (ΔSM) after mechanical alloying of Fe70Zr30 composition starting from high purity powders is studied. Samples with different shapes and different crystalline fraction X ... The field dependence of the magnetic entropy change (ΔSM) after mechanical alloying of Fe70Zr30 composition starting from high purity powders is studied. Samples with different shapes and different crystalline fraction X were analyzed. Although the results show that the proposed correction of the demagnetizing field has not a significant effect on ΔSM(T) curves (∼5% underestimation), it is necessary in order to properly analyze the field dependence of this magnitude (|ΔSM|=aHn). This correction allows recovering the theoretically predicted field dependence as well as a deeper analysis on multiphase systems. In fact, the biphasic character of the studied system changes the value of the field exponent n: it decreases below two above Curie temperature (TC), and it increases at TC. We show that, assuming a non-interacting phase model, it is possible to obtain the value of the exponent n for the main phase from the intercept of n vs X/ΔSM. |
Agencias financiadoras | Ministerio de Economia, Industria y Competitividad (MINECO). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía |
Identificador del proyecto | MAT 2013-45165-P
MAT-2016-77265-R |
Cita | Manchón Gordón, A.F., Ipus Bados, J.J., Moreno Ramírez, L.M., Blázquez Gámez, J.S., Conde Amiano, C.F., Franco García, V. y Conde Amiano, A. (2018). Correction of the Shape Effect on Magnetic Entropy Change in Ball Milled Fe70Zr30 Alloys. Journal of Alloys and Compounds, 765, 437-443. https://doi.org/10.1016/j.jallcom.2018.06.176. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
2018_JAC Correction of the shape ... | 809.1Kb | [PDF] | Ver/ | |