Repositorio de producción científica de la Universidad de Sevilla

The magnetocaloric effect and critical behavior in amorphous Gd 60Co 40-xMn x alloys.

 

Advanced Search
 
Opened Access The magnetocaloric effect and critical behavior in amorphous Gd 60Co 40-xMn x alloys.
Cites

Show item statistics
Icon
Export to
Author: Franco García, Victorino
Zheng, Zhigang
Zhong, Xichun
Yu, Hongya
Liu, Z. W.
Zeng, Dechang
Department: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Date: 2012
Published in: Journal of Applied Physics, 111 (07A922)
Document type: Article
Abstract: The amorphous alloys Gd60Co40−xMnx (x = 0, 5, 10, 15) were prepared by melt spinning. The Curie temperature,T c, increases monotonously with Mn addition, ranging from 198 K for x = 0 to 205 K for x = 15, while the maximum values of −ΔSM under the applied field change from 0 to 5 T are 7.7, 7.1, 6.2 and 5.4 J·kg−1·K−1 for x = 0, 5, 10, and 15, respectively. All samples undergo a second order ferri-paramagnetic phase transition. The critical behavior around the transitiontemperature is investigated in detail, using both the standard Kouvel-Fisher procedure as well as the study of the field dependence of the magnetocaloric effect. Results indicate that the obtained critical exponents are reliable, and that the present alloys exhibit local magnetic interaction.
Size: 1.075Mb
Format: PDF

URI: http://hdl.handle.net/11441/33493

DOI: http://dx.doi.org/10.1063/1.3673860

This work is under a Creative Commons License: 
Attribution-NonCommercial-NoDerivatives 4.0 Internacional

This item appears in the following Collection(s)