Anisotropic magnetodielectric effect in isotropic EuTiO3ceramics

Christelle Kadlec,Dalibor Repček,Filip Kadlec,Maxim Savinov,Martin Kachlík,Jan Drahokoupil,Petr Proschek,Jan Prokleška,Karel Máca,Stanislav Kamba

2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)（2020）

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摘要

EuTiO ₃ is an incipient ferroelectric antiferromagnet showing an anomalously strong spin-phonon coupling. We studied EuTiO ₃ ceramics by terahertz (THz) time-domain spectroscopy upon varying temperature and magnetic field. We observed a large anisotropy which is due to the shift from the microwave to the sub-THz region of a ferromagnetic resonance appearing only when the external magnetic field is applied perpendicular to the magnetic component of the THz radiation.

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关键词

external magnetic field,THz radiation,anisotropic magnetodielectric effect,isotropic EuTiO3 ceramics,ferroelectric antiferromagnet,spin-phonon coupling,terahertz time-domain spectroscopy,ferromagnetic resonance,EuTiO3

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