Coupling between magnetism and dielectric properties in quantum paraelectric EuTiO3

T. Katsufuji, H. Takagi

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291 Citations (Scopus)

Abstract

The dielectric constant of quantum paraelectric EuTiO3, which contains Eu2+ with S=7/2 spin and Ti4+, has been measured under a magnetic field. The dielectric constant shows a critical decrease at the antiferromagnetic ordering of the Eu spins at 5.5 K, as well as a substantial change under a magnetic field (by ∼7% with 1.5 T), indicating a strong coupling between the Eu spins and dielectric properties. We show that the variation of the dielectric constant is dominated by the pair correlation of the nearest-neighbor Eu spins, likely via the variation of the soft-phonon-mode frequency.

Original languageEnglish
Article number054415
Pages (from-to)544151-544154
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number5
Publication statusPublished - 2001 Aug 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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