Premium
Anisotropic Light Absorption in the Crystalline RbMnF 3 in the Frequency Region of the 6 A 1g ( 6 S) → 4 E 1g ( 4 G) Transition in the Magnetic Ion Mn 2+
Author(s) -
Petrov E. G.,
Kharkyanen V. N.
Publication year - 1973
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.2220560135
Subject(s) - degenerate energy levels , anisotropy , physics , crystal (programming language) , ion , atomic physics , energy level splitting , magnetic field , condensed matter physics , symmetry (geometry) , spin (aerodynamics) , field (mathematics) , absorption (acoustics) , optics , quantum mechanics , geometry , mathematics , computer science , pure mathematics , thermodynamics , programming language
A theory of one‐particle collective excitations of the cubic antiferrodielectric RbMnF 3 in an external magneticfield is developed for the doubly degenerate 4 E 1g ( 4 G) state of the magnetic ion Mn 2+ . The crystal anisotropy is taken into account. It is shown that the change in the equilibrium spin configuration in a magnetic field (which breaks the magnetic symmetry of a crystal) leads to the spin‐orbit splitting of the degenerate 4 E lg ( 4 G) level and to the further splitting of the obtained levels into the Davydov components. The formulas for the above splittings and for the intensities of optical transitions are obtainedfor different directions of a magnetic field. The results of theoretical calculations are used to explain experimental data.