Spin resonance in EuTiO3 probed by time-domain GHz ellipsometry

Abstract

We show an example of a purely magnetic spin resonance in EuTiO3 and the resulting new record high Faraday rotation of 590 deg/mm at 1.6 T for 1 cm wavelengths probed by a novel technique of magneto-optical GHz time-domain ellipsometry. From our transmission measurements of linear polarized light we map out the complex index of refraction in the GHz to THz 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.

4 pages, 4 figures

References in corpus (4)

• Giant Faraday rotation in single- and multilayer graphene
• Magnetoelastic coupling in RETiO3 (RE = La, Nd, Sm, Gd, Y)
• Magnetodielectric effect and optic soft mode behaviour in quantum paraelectric EuTiO3 ceramics
• Spin excitations in the antiferromagnet NaNiO2