Publication detail

Seemingly anisotropic magnetodielectric effect in isotropic EuTiO3 ceramics

ŘEPČEK, D. KADLEC, C. KADLEC, F. SAVINOV, M. KACHLÍK, M. DRAHOKOUPIL, J. PROSCHEK, P. PROKLEŠKA, J. MACA, K. KAMBA, S.

Original Title

Seemingly anisotropic magnetodielectric effect in isotropic EuTiO3 ceramics

Type

journal article in Web of Science

Language

English

Original Abstract

In the antiferromagnetic phase of EuTiO3 ceramics, a seemingly anisotropic magnetodielectric effect (up to 2.5%) was observed via the low-frequency dielectric permittivity measured in external magnetic field below 1.9 T. We explain the effect theoretically by taking into account the demagnetizing field which effectively reduces the internal magnetic flux density by 0.6 T when the external magnetic field is applied perpendicular to the plane of the disk-shaped sample. This finding is also confirmed experimentally by magnetization measurements. The refractive index between 0.2 and 0.5 THz exhibits a large anisotropy in an external magnetic field of up to 7 T. This anisotropy is due to a shift of the ferromagnetic resonance from the microwave to the sub-THz region with external magnetic field applied perpendicular to the magnetic component of the THz radiation. This magnon observation is performed in the strong external magnetic field (above 2 T) and in both paramagnetic and antiferromagnetic phases.

Keywords

magnetodielectric effect, magnetoelectrics, THz spectroscopy, IR spectroscopy

Authors

ŘEPČEK, D.; KADLEC, C.; KADLEC, F.; SAVINOV, M.; KACHLÍK, M.; DRAHOKOUPIL, J.; PROSCHEK, P.; PROKLEŠKA, J.; MACA, K.; KAMBA, S.

Released

1. 10. 2020

Publisher

AMER PHYSICAL SOC

Location

COLLEGE PK

ISBN

2469-9950

Periodical

PHYSICAL REVIEW B

Year of study

102

Number

14

State

United States of America

Pages from

1

Pages to

8

Pages count

8

URL

https://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=2&SID=C3U1nBBbLhrF9TaVhSc&page=1&doc=1

BibTex

@article{BUT168933,
  author="Dalibor {Řepček} and Christelle {Kadlec} and Filip {Kadlec} and Maxim {Savinov} and Martin {Kachlík} and Jan {Drahokoupil} and Petr {Proschek} and Jan {Prokleška} and Karel {Maca} and Stanislav {Kamba}",
  title="Seemingly anisotropic magnetodielectric effect in isotropic EuTiO3 ceramics",
  journal="PHYSICAL REVIEW B",
  year="2020",
  volume="102",
  number="14",
  pages="1--8",
  doi="10.1103/PhysRevB.102.144402",
  issn="2469-9950",
  url="https://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=2&SID=C3U1nBBbLhrF9TaVhSc&page=1&doc=1"
}