https://doi.org/10.1140/epjb/e2013-30823-y
Regular Article
The magnetocaloric effect in the vicinity of compensation temperature of ferrimagnetic DyCo4Al alloy
1 School of Material Science and
Engineering, Nanchang Hangkong University, Nanchang
330063, P.R.
China
2 Department of Physics, Nanjing
University, Nanjing
210093, P.R.
China
3 Department of mathematics and
physics, Information Engineering University, Zhengzhou
450001, P.R.
China
a e-mail: zzhong.2006@yahoo.com.cn
b e-mail: wangdh@nju.edu.cn
Received:
10
September
2012
Received in final form:
21
December
2012
Published online:
4
April
2013
The magnetic and magnetocaloric properties in ferrimagnetic DyCo4Al alloy are investigated in the vicinity of compensation temperature. A compensation temperature closed to room temperature is observed due to the spin-offset. On both sides of compensation temperature, the magnetization presents the abrupt change. As a consequence, two successive positive and negative magnetic entropy change peaks are obtained for this alloy. The appreciable magnetic entropy change values with a very wide refrigerant temperature interval (~200 K) corresponding to the positive magnetic entropy change peak would make this alloy suitable to be used in a magnetic refrigerator.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013