Magnetization and magnetic susceptibility of Co based HgSe with low Co concentration: Symmetry induced zero gap situation

In symmetry induced zero gap Hg 1− x Co x Se for x lower than 1%, magnetization and susceptibility are measured. The magnetization at 4.2 K is very well fitted with isolated Co 2+, whereas, at 1.5 K for the lowest Co concentration, the Co 3+ contribution must be taken into account as a corrective pa...

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Bibliographic Details
Published in:Solid state communications 1992-10, Vol.84 (4), p.479-485
Main Authors: Averous, M, Fau, C, Charar, S, El Kholdi, M, Ribes, V.D, Deportes, J, Golacki, Z
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Saturation moments and magnetic susceptibilities
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Summary:In symmetry induced zero gap Hg 1− x Co x Se for x lower than 1%, magnetization and susceptibility are measured. The magnetization at 4.2 K is very well fitted with isolated Co 2+, whereas, at 1.5 K for the lowest Co concentration, the Co 3+ contribution must be taken into account as a corrective part. The magnetic susceptibility shows two slopes. The first one under 80 K corresponds to antiferromagnetic interactions in agreement with the T 0 obtained from magnetization. The second one above 80 K shows ferromagnetic interactions which cannot be explained in terms of RKKY model and are probably due to the presence of CoSe clusters in our samples.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(92)90500-9