Magnetodielectric effects in low-dimensional cobalt oxides

M. Akaki, F. Nakamura, D. Akahoshi, H. Kuwahara

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We have investigated the magnetic and dielectric properties of BaCo2 Si2 O7 single crystal with a quasi-one-dimensional structure to explore novel magnetoelectric functionality. The Weiss temperatures estimated in paramagnetic region are - 20 K(H ∥ c) and - 74 K(H ⊥ c), indicating the large magnetic anisotropy due to the highly anisotropic structure. The weak ferromagnetic magnetization rises up at 21 K, where the dielectric constant perpendicular to the c-axis decreases concomitantly. In addition, we have observed the magnetocapacitance effect below 21 K. Δ ε{lunate} (H) / ε{lunate} (0) reaches 0.2% at 5.5 K. These results suggest that there exists a substantial coupling between magnetism and dielectricity.

Original languageEnglish
Pages (from-to)1505-1507
Number of pages3
JournalPhysica B: Condensed Matter
Issue number5-9
Publication statusPublished - 2008 Apr 1
Externally publishedYes


  • Antiferromagnetism
  • Magnetoelectric effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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