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Electron structure and phase diagrams of low‐temperature rare‐earth magnets
Author(s) -
Mitsek A. I.,
Yu. Guslienko K.,
Pavlovskii S. V.
Publication year - 1986
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.2221350118
Subject(s) - condensed matter physics , antiferromagnetism , ferromagnetism , magnet , anisotropy , magnetic moment , phase diagram , magnetic anisotropy , electron , anisotropy energy , ising model , exchange interaction , phase (matter) , physics , materials science , magnetization , magnetic field , quantum mechanics
The transition ion states are described by mixed many‐electron operators. The hybridization coefficients are calculated by the variational principle. Low‐temperature magnets are considered within the weak‐exchange energy limit. The destruction of the magnetic order is studied at the increase of the single‐ion anisotropy and (Ising's) exchange anisotropic energy. The magnetic phase diagrams (MPD) of the uniaxial and cubic magnets are calculated. The restrictions of the moment value J and anisotropy constant k at which these critical phenomena occur are determined here. The influence of superconductivity (SC) on the MPD is studied. An enhancement of SC is shown in the antiferromagnetic state. The intermediate helix phase is studied between the SC and ferromagnetic states.