Magnetocaloric effects in Er1-xTbxAl2 alloys

TitleMagnetocaloric effects in Er1-xTbxAl2 alloys
Publication TypeJournal Article
Year of Publication2010
AuthorsKhan M, Gschneidner KA, Pecharsky VK
Journal TitleJournal of Applied Physics
Volume107
Pages09a904
Date Published05/01
ISBN Number0021-8979
Accession NumberISI:000277834300109
Abstract

The magnetocaloric properties of the (Er1-xTbx)Al-2 alloys have been evaluated by magnetization and heat capacity measurements. It is shown that by partial substitution of Er by Tb the ferromagnetic ordering temperature of (Er1-xTbx)Al-2 can be tuned over a wide range of temperatures, that is from 13 K (ErAl2) to 110 K (TbAl2). Over the entire temperature range the alloy system exhibits large magnetocaloric effect. For a field change of 5 T, the observed magnetic entropy changes peaks from -18 J/kg K (x=0.20) to -12 J/kg K (x=0.90). The adiabatic temperature changes measured for selected alloys in the series show a maximum value of 6 K when the magnetic field is changed from 0 to 5 T. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3335590]

URL<Go to ISI>://000277834300109
DOI10.1063/1.3335590