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Monte‐Carlo Simulation on Random Magnetic Mixture with Competing Anisotropy. Oblique Antiferromagnetism of CsMn 1−x Co x Cl 3 · 2 H 2 O
Author(s) -
Kato T.
Publication year - 1994
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.2221820123
Subject(s) - antiferromagnetism , monte carlo method , condensed matter physics , anisotropy , phase (matter) , phase diagram , physics , spin (aerodynamics) , atom (system on chip) , crystallography , chemistry , thermodynamics , optics , statistics , mathematics , quantum mechanics , computer science , embedded system
A Monte‐Carlo simulation for a simplified model for CsMn 1−x Co x Cl 3 · 2H 2 O which is a typical magnetic mixture with competing anisotropies is performed. From calculations for the magnetic moment of each atom and the magnetic susceptibilities, it is found that the characteristic features of the phase diagram are reproduced by the present model. That is, besides the CsMnCl 3 · 2 H 2 O‐type antiferromagnetic phase and the CsCoCl 3 · 2 H 2 O‐type one, an intermediate phase exists in between the two phases. In the intermediate concentration region two successive second‐order phase transitions occur with increasing temperature. The spin structure of the intermediate phase is consistent with the NMR result of Kubo et al., that is, there exist two perpendicular antiferromagnetic domains linked over the whole crystal, which are separated by domain walls.