Physics – Condensed Matter – Materials Science
Scientific paper
2001-04-27
Physical Review B, Volume 64, 174406 (2001)
Physics
Condensed Matter
Materials Science
15 pages, 6 figures, published in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.64.174406
Single crystalline films of bismuth-substituted ferrite garnets have been synthesized by the liquid phase epitaxy method where GGG substrates are dipped into the flux. The growth parameters are controlled to obtain films with in-plane magnetization and virtually no domain activity, which makes them excellently suited for magnetooptic imaging. The Faraday rotation spectra were measured across the visible range of wavelengths. To interprete the spectra we present a simple model based on the existence of two optical transitions of diamagnetic character, one tetrahedral and one octahedral. We find excellent agreement between the model and our experimental results for photon energies between 1.77 and 2.53 eV, corresponding to wavelengths between 700 and 490 nm. It is shown that the Faraday rotation changes significantly with the amount of substituted gallium and bismuth. Furthermore, the experimental results suggest that the magnetooptic response changes linearly with the bismuth substitution.
Baziljevich Michael
Hansen Roger W.
Helseth Lars Egil
Il'yashenko E. I.
Johansen Tom H.
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