Spin-Orbit Coupling in Cr3+ Ion in Solid State Materials

A.J. Wojtowicz, M. Grinberg Institute of Physics, N. Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland and A. Łempicki. Chemistry Department, Boston University, Boston, USA

Received: August 8, 1990

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In this paper we introduce a new model describing the coupling of 2E and 4T2 states of octahedrally coordinated Cr3+ ion, which includes spin-orbit and electron-lattice interactions and takes into account the electronic structure of both states. The model is used to calculate doublet lifetime. We have applied this model to the series of Cr3+ doped garnets characterized by the varying crystal field parameter 10 Dq and Oh symmetry of the Cr site and to the kyanite (Al2O3:SiO2), which is the case of different Cr3+ sites in one material, characterized by the relatively large component of the low symmetry crystal field. The agreement with experiment is reasonable.

DOI: 10.12693/APhysPolA.79.235 PACS numbers: 78.55.Hx