Magnetocaloric effect and critical behavior of Ni7Cu3 alloys

DOI

10.2991/meic-14.2014.50How to use a DOI?

Keywords

Ni7Cu3 alloy; magnetic property; Magnetocaloric effect; critical behavior; magnetic entropy change

Abstract

The Ni7Cu3 alloy was prepared by arc-melting. The magnetic and magnetocaloric properties of alloys had been investigated. The Ni7Cu3 alloy was formed in a single phase with Cubic Ni-type crystal structure. The sample undergoes a second order magnetic phase transition from ferromagnetic (FM) to paramagnetic (PM) and its Curie temperature is 293.7 K. A maximum values of magnetic entropy change are found to be 1.3, 1.1, 0.8, 0.6 and 0.3 J·kg-1·K-1 under 5T, 4T, 3T, 2T and 1T respectively, which are comparable with some ferromagnetic materials, such as Nd0.9Dy0.1Co4Al. The critical behavior around the transition temperature is investigated in detail, using both the standard Kouvel - Fisher procedure as well as the study of the field dependence of the magnetocaloric effect. The values of the exponents and are 0.608 and 2.138 respectively, which are large than the value of pure Ni. Results indicate that there are long-range magnetic coupling for Ni7Cu3 alloy.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jimei Niu
AU  - Zhigang Zheng
AU  - Jiliang Zhang
PY  - 2014/11
DA  - 2014/11
TI  - Magnetocaloric effect and critical behavior of Ni7Cu3 alloys
BT  - Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 221
EP  - 224
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-14.2014.50
DO  - 10.2991/meic-14.2014.50
ID  - Niu2014/11
ER  -