Charge transfer-originated large Faraday rotation in Rh{sup 4+}-substituted magnetic garnets
- Department of Physics, Toho University, Funabashi, Chiba 274 (Japan)
A large Faraday rotation is reported for Rh{sup 4+}-substituted magnetic garnets in the near-infrared wavelength region. The Faraday rotation at 0.9 {mu}m is about seven times larger than that in yttrium iron garnet by substituting Rh{sup 4+} ions of only 0.13 per formula unit at room temperature. From the electronic state calculations of a (Rh{sup 4+}O{sub 6}{sup 2{minus}}){sup 8{minus}} octahedral cluster performed by using an unrestricted self-consistent field{endash}scattering wave{endash}X {alpha} method, the origin of the Faraday rotation is attributable to the charge transfer transitions of an electron from O 2p to Rh 4d orbitals, or t{sub 1u}{sup n}(2p){r_arrow}t{sub 2g}{sup {asterisk}}(4d) and t{sub 2u}{sup n}(2p){r_arrow}t{sub 2g}{sup {asterisk}}(4d) transitions. Based on this assignment, the Faraday rotation spectrum is calculated by taking into account the spin{endash}orbit interaction and the molecular field from iron magnetizations in the magnetic garnet. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 450235
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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