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Proceedings Paper

Microscopic origin of optical absorption for Bi-YIG magneto-optic thin film
Author(s): Huaan Hu; Zhiyun Duan; Jianhong Wang
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Paper Abstract

The density of states and orbital energies of (Y3+Fe3+6O2-8)5+ cluster of YIG and (Bi3+Fe36O2-8)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.

Paper Details

Date Published: 10 August 1998
PDF: 6 pages
Proc. SPIE 3562, Optical Storage Technology, (10 August 1998); doi: 10.1117/12.318495
Show Author Affiliations
Huaan Hu, Wuhan Institute of Economics (China)
Zhiyun Duan, Wuhan Institute of Economics (China)
Jianhong Wang, Wuhan Institute of Economics (China)


Published in SPIE Proceedings Vol. 3562:
Optical Storage Technology
Duanyi Xu; Seiya Ogawa, Editor(s)

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