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 language | English |
|---|---|
| Article number | 054415 |
| Pages (from-to) | 544151-544154 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 64 |
| Issue number | 5 |
| Publication status | Published - 2001 Aug 1 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Katsufuji, T., & Takagi, H. (2001). Coupling between magnetism and dielectric properties in quantum paraelectric EuTiO3. Physical Review B - Condensed Matter and Materials Physics, 64(5), 544151-544154. [054415].