Anisotropic Light Absorption in the Crystalline RbMnF3 in the Frequency Region of the 6A1g(6S) → 4E1g(4G) Transition in the Magnetic Ion Mn2+

✍ Scribed by E. G. Petrov; V. N. Kharkyanen

• Publisher: John Wiley and Sons
• Year: 1973
• Tongue: English
• Weight: 558 KB
• Volume: 56
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220560135

✦ Synopsis

Abstract

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.