Effects of Cu substitution on structural and magnetic properties of La0.7Pr0.3Fe11.4Si1.6 compounds

Authors

M F. Md Din, University of WollongongFollow
Jianli Wang, University of WollongongFollow
R Zeng, University of WollongongFollow
P Shamba, University of WollongongFollow
J C. Debnath, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

74922

Publication Details

Md Din, M. F., Wang, J. L., Zeng, R., Shamba, P., Debnath, J. C. and Dou, S. X. (2013). Effects of Cu substitution on structural and magnetic properties of La0.7Pr0.3Fe11.4Si1.6 compounds. Intermetallics, 36 1-7.

Abstract

The structure and magnetic properties of the La0.7Pr 0.3Fe11.4-xCuxSi1.6 compounds have been investigated by X-ray diffraction, scanning electron microscopy and magnetisation measurements. Cu substitution for Fe in La0.7Pr 0.3Fe11.4-xCuxSi1.6 (x = 0, 0.06, 0.12, 0.23, 0.34) leads to a reduction in hysteresis loss, a decrease in magnetic entropy change but an increase in Curie temperature (TC). The influences of annealing processes at different temperatures on T C, magnetic hysteresis, and the magnetocaloric effect (MCE) of La0.7Pr0.3Fe11.4Si1.6 are investigated in detail. It has been found that a short-time and high temperature annealing process has benefits for the formation of the NaZn13 types as phase compared to a long-time and low temperature annealing process.