Spin resonance in EuTiO3 probed by time-domain gigahertz ellipsometry

Spin resonance in EuTiO3 probed by time-domain gigahertz ellipsometry

We show an example of a purely magnetic spin resonance in EuTiO(3) and the resulting new record high Faraday rotation of 590°/mm at 1.6 T for 1 cm wavelengths probed by a novel technique of magneto-optical gigahertz time-domain ellipsometry. From our transmission measurements of linear polarized lig...

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Veröffentlicht in:Physical review letters 2011-05, Vol.106 (21), p.217601-217601
Hauptverfasser: van Mechelen, J L M, van der Marel, D, Crassee, I, Kolodiazhnyi, T
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container_title Physical review letters
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creator van Mechelen, J L M
van der Marel, D
Crassee, I
Kolodiazhnyi, T
description We show an example of a purely magnetic spin resonance in EuTiO(3) and the resulting new record high Faraday rotation of 590°/mm at 1.6 T for 1 cm wavelengths probed by a novel technique of magneto-optical gigahertz time-domain ellipsometry. From our transmission measurements of linear polarized light, we map out the complex index of refraction n=√ϵμ in the gigahertz to terahertz range. We observe a strong resonant absorption by magnetic dipole transitions involving the Zeeman split S=7/2 magnetic energy levels of the Eu(2+) ions, which causes a very large dichroism for circular polarized radiation.
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title Spin resonance in EuTiO3 probed by time-domain gigahertz ellipsometry
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