Magnetocaloric effects in Er[sub 1-x]Tb[sub x]Al[sub 2] alloys

Khan, Mahmud; Gschneidner, K. A.; Pecharsky, V. K.

doi:10.1063/1.3335590

Magnetocaloric effects in Er[sub 1-x]Tb[sub x]Al[sub 2] alloys

Journal Article · Thu Dec 31 23:00:00 EST 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3335590· OSTI ID:976961

Khan, Mahmud; Gschneidner, K. A.; Pecharsky, V. K.

The magnetocaloric properties of the (Er{sub 1-x}Tb{sub x})Al{sub 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 (Er{sub 1-x}Tb{sub x})Al{sub 2} can be tuned over a wide range of temperatures, that is from 13 K (ErAl{sub 2}) to 110 K (TbAl{sub 2}). 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.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 976961

Report Number(s):: IS-J 7530

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 107; ISSN JAPIAU; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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