Magnetocapacitance effect and related microstrucuture in Ti-doped YMnO3

S. Mori*, J. Tokunaga, Y. Horibe, Y. Aikawa, T. Katsufuji

*この研究の対応する著者

研究成果: Article査読

37 被引用数 (Scopus)

抄録

We have investigated microstructures giving rise to magnetocapacitance effect in Ti-doped YMnO3 (YMn1-xTixO3) by both electron diffraction and real-space imaging techniques. Diffuse scattering elongating along the [110] direction due to the instability of the Mn trimerization were found in the x=0.175 compound, which exhibits the enhanced magnetocapacitance effect. With increasing Ti concentration, the centrosymmetric (paraelectric) R3̄c phase grows up at the expense of the ferroelectric P63cm phase around x=0.20 and the R3̄c phase is dominant above x=0.30. Our present results indicate that the Mn trimers with the short-range correlation inside the ferroelectric nanodomains with the 10-20nm size should be responsible for the enhancement of the magnetocapacitance and, on the other hand, the appearance of the R3̄c phase suppressed the magnetocapacitance effect.

本文言語English
論文番号224434
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
72
22
DOI
出版ステータスPublished - 2005 12月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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