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Self‐Consistent Four‐Particle Cluster Model of Fe 3+ Heisenberg Chains: Spectral and Magnetic Properties of YFe 3 (BO 3 ) 4 Crystals
Author(s) -
Malkin Boris Z.,
Popova Elena A.,
Chukalina Elena P.,
Jablunovskis Artjoms,
Popova Mari.
Publication year - 2020
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201900603
Subject(s) - antiferromagnetism , condensed matter physics , multiferroics , materials science , ion , anisotropy , heisenberg model , magnetic moment , cluster (spacecraft) , dipole , crystal (programming language) , lattice (music) , isotropy , chemistry , ferroelectricity , physics , dielectric , computer science , programming language , optoelectronics , organic chemistry , quantum mechanics , acoustics
The magnetic properties of antiferromagnetic quasi‐1D YFe 3 (BO 3 ) 4 crystals are studied based on the analysis of the measured optical spectra of the Fe 3+ ions in different rare‐earth (RE) iron borates and a self‐consistent four‐particle cluster approach to helical iron chains. The parameters of crystal fields affecting the Fe 3+ ions are calculated in the framework of the exchange charge model. The parameters of the isotropic intrachain and interchain exchange interactions between the Fe 3+ ions are determined from modeling the temperature dependences of magnetic susceptibilities, the phase transition temperature, and spontaneous magnetic moments. The magnetic easy‐plane anisotropy is explained as the result of dipolar interactions between the Fe 3+ ions in the trigonal crystal lattice. The developed model can be used to analyze and predict the properties of multiferroic multifunctional RE iron borates and highlight contributions of the iron subsystem into the magnetoelectric and magnetoelastic effects in these compounds.