Microscopic origin of optical absorption for Bi-YIG magneto-optic thin film

Huaan Hu; Zhiyun Duan; Jianhong Wang

doi:10.1117/12.318495

10 August 1998 Microscopic origin of optical absorption for Bi-YIG magneto-optic thin film

Huaan Hu, Zhiyun Duan, Jianhong Wang

Proceedings Volume 3562, Optical Storage Technology; (1998) https://doi.org/10.1117/12.318495
Event: Photonics China '98, 1998, Beijing, China

Abstract

The density of states and orbital energies of (Y³⁺Fe³⁺₆O^2-₈)⁵⁺ cluster of YIG and (Bi³⁺Fe³₆O^2-₈)⁵⁺ cluster of Bi-YIG are calculated by using DV-X(alpha) method. The wavefunctions of some orbits of clusters are given. From total density of state and wavefunctions, it is found that the spin-orbit interaction is increased by the formation of molecular orbit between 3d orbital in Fe³⁺ and 6p orbital in Bi³⁺ having a large spin-orbit interaction coefficient and the oscillator strengths of transitions are increased because of bismuth substitution. There are two types of charge transfer transition between -3.2 approximately 3.2 eV on the basis of the total density of energy states of YIG and Bi-YIG films. The optical absorption spectra of Bi-YIG are calculated while x equals 0, 0.4, 1.0 in the wavelength from 0.5 micrometers to 0.9 micrometers . The dependence of absorption coefficient (alpha) on transition linewidths (Gamma) , and spin-orbit splitting energies (Delta) _i of coupling orbits are investigated respectively. The influence of Bi³⁺ ion on optical absorption is obtained.

Citation Download Citation

Huaan Hu, Zhiyun Duan, and Jianhong Wang "Microscopic origin of optical absorption for Bi-YIG magneto-optic thin film", Proc. SPIE 3562, Optical Storage Technology, (10 August 1998); https://doi.org/10.1117/12.318495

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