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Magnetic susceptibility anomaly in nearly equiatomic MnNi alloys
Author(s) -
Pál L.,
Tarnóczi T.,
Konczos G.
Publication year - 1970
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.19700420105
Subject(s) - magnetic susceptibility , antiferromagnetism , manganese , nickel , condensed matter physics , paramagnetism , materials science , neutron diffraction , magnetic shape memory alloy , anomaly (physics) , anisotropy , phase (matter) , crystallography , magnetic field , chemistry , magnetic anisotropy , metallurgy , crystal structure , physics , magnetization , organic chemistry , quantum mechanics
The crystallographic and magnetic properties of nearly equiatomic nickel–manganese alloys have been investigated by X‐ray and neutron diffraction techniques as well as by classical susceptibility measurements. It has been found that the antiferromagnetic–paramagnetic phase transition takes place in most of the cases as a result of the θ → β allotropic transformation. It has been observed that the temperature dependence of the susceptibility in alloys containing somewhat more than 50% nickel is strongly influenced by an external magnetic field. Samples cooled down slowly in a magnetic field of several kOe have a room temperature susceptibility three to four times higher than before the heat treatment. The increased susceptibility shows an unidirectional anisotropy which is explained by the non‐equal distribution of the excess nickel atoms between the two manganese sublattices.