Journal Article

FZJ-2015-03811

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Magnetocaloric effect in RAl$_{2}$ (R=Nd, Sm, and Tm): Promising for cryogenic refrigeration close to liquid helium temperature

Patra, M. ; Majumdar, S. ; Giri, S. (Corresponding Author) ; Xiao, Y.FZJ* ; Chatterji, T.

2012
Elsevier Lausanne

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Please use a persistent id in citations: doi:10.1016/j.jallcom.2012.03.076

Abstract: NdAl2 and TmAl2 single-crystals display Curie temperature (TC) at 76.5 and 6.0 K, which are significantly close to liquid nitrogen and helium (THe) temperatures, respectively. Maximum entropy-change (−ΔSM) for 0–70 kOe are 35.9 and 8.9 J/kg-K at TC with large cooling efficiency 655 and 398 J/kg for TmAl2 and NdAl2, respectively. Adiabatic temperature change at THe for 0–20 kOe is 3.7 K for TmAl2. This is promising for cryogenic refrigeration down to sub-Kelvin temperature using an electromagnet. The −ΔSM for SmAl2 is low (∼0.5 J/kg-K at TC for 0–70 kOe). The direction-dependent anisotropy in thermal and field variations of ΔSM, and a reasonable correlation between ΔSM and magnetoresistance are realized for NdAl2 and TmAl2.

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 422 - Spin-based and quantum information (POF2-422) (POF2-422)
2. 424 - Exploratory materials and phenomena (POF2-424) (POF2-424)
3. 542 - Neutrons (POF2-542) (POF2-542)
4. 544 - In-house Research with PNI (POF2-544) (POF2-544)
5. 54G - JCNS (POF2-54G24) (POF2-54G24)

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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