Structural and magnetocaloric properties of novel gadolinium borohydrides

Authors
Schouwink, PascalDidelot, EmilieLee, Young-SuMazet, ThomasCerny, Radovan
Issue Date
2016-04-15
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.664, pp.378 - 384
Abstract
Novel Gd-based mixed-metal borohydrides A(n)Gd(BH4)(n+3) (A - K, Cs) are described in view of their magnetic cooling properties at cryogenic temperatures. The magnetic entropy changes correlate well with Gd3+ isolation and structural dimensionality in the discovered perovskite-type and other compounds. Crystal structures are resolved from Synchrotron X-ray Powder Diffraction and refined with solid state calculations. The isolated Gd-centres in five-fold coordination in K2Gd(BH4)(5), the first representative of a new structure type, lead to exceptionally high mass magnetic entropy change of 54.6 J kg(-1) K-1 at the maximum field change of 9 T. (C) 2016 Published by Elsevier B.V.
Keywords
METAL BOROHYDRIDES; DEMAGNETIZATION; REFRIGERATION; TEMPERATURES; FRAMEWORK; LI; METAL BOROHYDRIDES; DEMAGNETIZATION; REFRIGERATION; TEMPERATURES; FRAMEWORK; LI; Magnetocaloric effect; Gadolinium; Borohydride; Perovskite; Powder diffraction
ISSN
0925-8388
URI
https://pubs.kist.re.kr/handle/201004/124168
DOI
10.1016/j.jallcom.2015.12.182
Appears in Collections:
KIST Article > 2016
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