Abstract
Novel Gd-based mixed-metal borohydrides A
n
Gd(BH
4
)
n+3
(A = K, Cs) are described in view of their magnetic cooling properties at cryogenic temperatures. The magnetic entropy changes correlate well with Gd
3+
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 K
2
Gd(BH
4
)
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.
Graphical abstract
Highlights
• We investigate novel gadolinium borohydride salts in view of magnetic refrigeration.
• DFT-optimized structural properties are correlated with magnetic entropy changes.
• Two new 5-fold coordination polyhedra [Gd(BH
4
)
5
]
2−
are discovered.
• A large magnetocaloric effect is attained with the lightweight borohydride linker.
Page:
378-378
Related
Batch download
Cited By
noting
Similar Literature
Submit Feedback
Please wait while the file you selected is being converted