In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2011, No. 26 ( 2011-09), p. 3950-3954
Abstract:
We report the quaternary Heusler compound derivatives CoFe 1+ x Ti 1– x Al and CoMn 1+ x V 1– x Al, which do not have centers of inversion. Classical T 2 T′M (T, T′ = transition metal, M = main group element) Heusler compounds (prototype: Cu 2 MnAl) crystallize in the L 2 1 structure, space group Fm $\bar {3}$ m (225) that exhibits a center of inversion. Replacing one of the T 2 atoms by another transition element (T″) results in a quaternary TT′T″M compound with F $\bar {4}$ 3 m symmetry (Y; structure type LiMgPdSn) without center of inversion. In the case of “quasi closed shell” compounds with 24 valence electrons in the primitive cell, one expects the absence of ferromagnetism according to the Slater–Pauling rule. Increasing the number of valence electrons will allow a study of the onset of the magnetic ground state. In this work, CoFeTiAl and isovalent CoMnVAl as well as the accompanying solid solutions CoFe 1+ x Ti 1– x Al and CoMn 1+ x V 1– x Al were synthesized and their structure and magnetic properties investigated. CoMn 1+ x V 1– x Al ( x 〉 0) is a half‐metallic ferrimagnet in which the magnetic ground state is controlled by the strong localized moment at the Mn atoms replacing V.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2011.26
DOI:
10.1002/ejic.201100002
Language:
English
Publisher:
Wiley
Publication Date:
2011
detail.hit.zdb_id:
1475009-0
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