Effect of Fe substitution on magnetic and magnetocaloric effect in Gd(Co1-xFex)2B2 compounds

Lingwei Li*, Yasuhiro Nishimura, Dexuan Huo, Zhenghong Qian, Katsuhiko Nishimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Polycrystalline samples of Gd(Co1-xFe x)2B2 (x 0, 0.1, 0.2, and 0.4) compounds have been prepared and their magnetic properties and magnetocaloric effect (MCE) have been studied by the magnetization and heat capacity measurements. As the Fe content x increases up to 0.4, the magnetic ordering temperature TM increases gradually from 19 to 32 K, the maximum values of magnetic entropy change -ΔSMmax decreases gradually from 17.1 to 12.1 J/kg K without obvious hysteresis around its own ΔTM for a field change of 5 T, and the corresponding adiabatic temperature change T admax also decreases gradually from 15.4 to 8 K. The reduction in the MCE of Gd(Co1-xFex) 2B2 system could be explained by the fact that the increase in the Fe content transforms the magnetic transition type from a first order type to a second order type. The values of relative cooling power (RCP) are 462, 434, 499, and 415 J/kg for x 0, 0.1, 0.2, and 0.4 in Gd(Co 1-xFex)2B2, respectively. The magnetic transition and Fe substitution effect on MCE as well as its potential application in Gd(Co1-xFex) 2B2 system were discussed.

Original languageEnglish
Article number083915
JournalJournal of Applied Physics
Volume110
Issue number8
DOIs
StatePublished - 2011/10/15

ASJC Scopus subject areas

  • General Physics and Astronomy

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