Magnetic properties and large magnetocaloric effect in Gd-Ni amorphous ribbons for magnetic refrigeration applications in intermediate temperature range

TitleMagnetic properties and large magnetocaloric effect in Gd-Ni amorphous ribbons for magnetic refrigeration applications in intermediate temperature range
Publication TypeJournal Article
Year of Publication2011
AuthorsZhong XC, Tang PF, Liu ZW, Zeng DC, Zheng ZG, Yu HY, Qiu WQ, Zou M
Journal TitleJournal of Alloys and Compounds
Volume509
Pages6889-6892
Date Published06/16
ISBN Number0925-8388
Accession NumberISI:000290793000037
Keywordsalloys, bulk metallic glasses, CU, ENTROPY CHANGE, fe, gd-ni amorphous alloys, MAGNETIC REFRIGERATION, magnetocaloric effect, melt spinning, room-temperature, transition
Abstract

Amorphous Gd68-xNi32+x (x = -3, 0, 3) ribbons were prepared by melt-spinning method. The crystallization onset temperatures T-x1 for Gd68-xNi32+x amorphous ribbons with x = -3, 0, and 3 are 561, 568, and 562 K, respectively. All the samples undergo the second-order magnetic transition at temperatures between similar to 122 (x = -3 and 3) and 124K (x = 0). The Curie temperature T-C does not change with the composition significantly. The maximum isothermal magnetic entropy changes (-Delta S-M)(max) of Gd71Ni29, Gd68Ni32, and Gd65Ni35 amorphous ribbons for a magnetic field change of 0-5 T were 9.0, 8.0, and 6.9 J kg(-1) K-1, respectively. Large values of the refrigerant capacity (RC) were obtained in these ribbons. For example, Gd71Ni29 amorphous ribbon has a maximum RC value of 724 J kg(-1). Large magnetic entropy change and RC values together with high stability enable the Gd71Ni29 amorphous alloy a competitive candidate among the magnetic refrigeration materials working at temperatures near 120 K. (C) 2011 Elsevier B.V. All rights reserved.

URL<Go to ISI>://000290793000037
DOI10.1016/j.jallcom.2011.03.173
Alternate JournalJ Alloy CompdJ Alloy Compd