Magnetic and dielectric properties of R0.5Ca 0.5MnO3 (R = Eu-Lu)

Kenji Yoshii, Yusuke Hiramitsu, Yasuhiro Yoneda, Yuka Okajima, Yasuo Nishihata, Jun'ichiro Mizuki, Naoshi Ikeda

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Abstract

The magnetic and dielectric properties of perovskite manganites R0.5Ca0.5MnO3 (R = Eu-Lu), which show charge ordering of the Mn-3d electrons below room temperature, have been investigated. Their dielectric constants were ∼1000-10000 at around room temperature. Inflections or peaks of temperature dependences of the dielectric constants were observed at around the charge-ordering temperatures. Analyses of tan δ for R = Eu-Lu and EXAFS spectra for R = Dy suggested that the dielectric properties of the present system are rooted in a special arrangement and transfer of the Mn-3d electrons. The two-peak structure of tan δ indicates that dielectric measurement can be used to observe homogeneity or inhomogeneity of sample, as mentioned in our previous paper on the ruthenium perovskite oxides.

Original languageEnglish
Pages (from-to)183-190
Number of pages8
JournalFerroelectrics
Volume379
Issue number1 PART 2
DOIs
Publication statusPublished - 2009

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Keywords

  • Dielectric property
  • Electron transfer
  • EXAFS
  • Magnetic property
  • Manganite
  • Perovskite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Yoshii, K., Hiramitsu, Y., Yoneda, Y., Okajima, Y., Nishihata, Y., Mizuki, J., & Ikeda, N. (2009). Magnetic and dielectric properties of R0.5Ca 0.5MnO3 (R = Eu-Lu). Ferroelectrics, 379(1 PART 2), 183-190. https://doi.org/10.1080/00150190902852208