Spin Resonance in EuTiO3 Probed by Time-Domain Gigahertz Ellipsometry

J. L. M. van Mechelen, D. van der Marel, I. Crassee, and T. Kolodiazhnyi
Phys. Rev. Lett. 106, 217601 – Published 25 May 2011

Abstract

We show an example of a purely magnetic spin resonance in EuTiO3 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 Eu2+ ions, which causes a very large dichroism for circular polarized radiation.

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  • Received 3 March 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.217601

© 2011 American Physical Society

Authors & Affiliations

J. L. M. van Mechelen1, D. van der Marel1, I. Crassee1, and T. Kolodiazhnyi2

  • 1Département de Physique de la Matière Condensée, Université de Genève, Genève, Switzerland
  • 2National Institute of Materials Science, Tsukuba, Ibaraki, Japan

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Issue

Vol. 106, Iss. 21 — 27 May 2011

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