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Structural and magnetocaloric properties of novel gadolinium borohydrides

Lee, Young-Su
Mazet, Thomas
Published in Journal of Alloys and Compounds. 2016, vol. 664, p. 378-384
Abstract Novel Gd-based mixed-metal borohydrides AnGd(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.
Keywords BorohydrideMagnetocaloric effect
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Research group Groupe Cerny
Project FNS: 200020_149218
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SCHOUWINK, Pascal et al. Structural and magnetocaloric properties of novel gadolinium borohydrides. In: Journal of Alloys and Compounds, 2016, vol. 664, p. 378-384. https://archive-ouverte.unige.ch/unige:79451

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Deposited on : 2016-01-18

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