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Large H Absorption in Nd2Ni2In; Magnetism in a New Structure Type

Published online by Cambridge University Press:  31 January 2011

Ladislav Havela ,
Silvie Mašková ,
Stanislav Daniš ,
Olha Stelmakhovych  and
Khrystyna Miliyanchuk
Ladislav Havela
Affiliation:
havela@mag.mff.cuni.cz, Charles University, Department of Condensed Matter Physics, Prague 2, Czech Republic
Silvie Mašková
Affiliation:
maskova@mag.mff.cuni.cz, Charles University, Department of Condensed Matter Physics, Prague, Czech Republic
Stanislav Daniš
Affiliation:
danis@mag.mff.cuni.cz, Charles University, Department of Condensed Matter Physics, Prague 2, Czech Republic
Olha Stelmakhovych
Affiliation:
ostelmakhovych@gmail.com, Ivan Franko National University, Lviv, Ukraine
Khrystyna Miliyanchuk
Affiliation:
x.miliyanchuk@gmail.com, Ivan Franko National University, Lviv, Ukraine
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Abstract

Several hydrides of Nd2Ni2In with various H concentrations up to 6 H atoms/f.u. have been synthesized. Nd2Ni2In crystallizes in the tetragonal Mo2FeB2 structure type which can be changed upon hydrogenation to an orthorhombic structure, space group Pbma. The unit-cell volume increases by 15.5 % for Nd2Ni2InH4.5 and by 21.6 % for Nd2Ni2InH6. The triangular rare-earth lattice can give rise to magnetic frustration in case of antiferromagnetic interactions in Nd2Ni2In. The frustration is removed upon hydrogenation due to the orthorhombic distortion. The magnetic ordering temperature decreases with H concentration from 8 K in Nd2Ni2In down to 3.5 K in Nd2Ni2InH6.

Keywords

magnetic propertieshydrogenationNd
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1216: Symposium W – Hydrogen Storage Materials , 2009 , 1216-W03-12
Copyright
Copyright © Materials Research Society 2010

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References

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