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Electronic and magnetic properties of NiMn 1− x Ho x Sb compounds
Author(s) -
Grasin Robert,
Rusu Calin,
Laslo Ancuta,
Dudric Roxana,
Mican Sever,
Neumann Manfred,
Tetean Romulus
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201147553
Subject(s) - holmium , magnetic moment , antiferromagnetism , magnetization , condensed matter physics , materials science , manganese , transition metal , inductive coupling , metal , electronic structure , coupling (piping) , crystallography , chemistry , magnetic field , physics , metallurgy , laser , biochemistry , quantum mechanics , optics , catalysis
We study the effects of holmium doping in the half‐Heusler compound NiMnSb. Band structure calculations show that the half‐metallic properties are completely conserved if holmium atoms substitute the manganese ones. The antiparallel coupling of Ho and transition metal magnetic moments was found to be more favorable. The magnetization measurements are in agreement with the results of the structural and XPS analysis and confirm that the holmium atoms occupy lattice sites. There is a very good agreement between the experimental magnetic moments determined at 4.2 K and the calculated ones in the case of antiferromagnetic coupling between the Ho and transition metal magnetic moments.