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Strong magneto-optical enhancement in highly Ce-substituted iron garnet films prepared by sputtering
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Copyright (1991) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.The following article appeared in Journal of Applied Physics, 70(11), pp.7065- 7067 ; 1991and may be found at http://link.aip.org/link/?jap/70/7065
Faraday rotation and ellipticity spectra were measured at photon energies hν=0.9-4.0 eV for R3-xCexFe5O12 (R=Y, Gd, Yb) films with substitutions up to x=2.5, expitaxially grown by rf sputtering. The Ce substitution prominently enhances the Faraday effect not only in the IR region at hν=1.4 eV but also in the UV region at hν=3.1 eV. Both transitions have a paramagnetic dispersion relation, which are nearly equal in magnitude but opposite in sign. Optical absorption is also induced by a new transition due to Ce3+ at hν=2.1 eV, which does not enhance Faraday rotation. These electronic transitions may be attributed to charge transfer transition Ce3+(4f)‐Fe3+(tet.).
Strong magneto-optical enhancement in highly Ce-substituted iron garnet films prepared by sputtering
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