Heat capacity proportional to T2 induced by Ru substitution in CaCu3 (Ti4-x Rux) O12 (x≈0.5)

I. Tsukada, R. Kammuri, T. Kida, S. Yoshii, T. Takeuchi, M. Hagiwara, M. Iwakawa, W. Kobayashi, I. Terasaki

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The effect of Ru substitution for Ti on the ground-state properties of three-dimensional antiferromagnet (AF) CaCu3 Ti4 O12 is studied by means of magnetic susceptibility and heat-capacity measurements. A small amount of Ru substituted for Ti suppresses AF long-range order and induces a new intermediate state with T2 -proportional heat capacity, which shows a clear contrast to a simple spin-dilution effect demonstrated by the Zn substitution for Cu. Ru substitution also creates a finite density of state at the Fermi level while keeping nominal valence of Cu ions to be 2+, which is essential to a novel insulator-to-metal crossover driven by an isovalent substitution of Ru4+ for Ti4+.

本文言語English
論文番号054430
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
79
5
DOI
出版ステータスPublished - 2009 2 26

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

フィンガープリント

「Heat capacity proportional to T2 induced by Ru substitution in CaCu3 (Ti4-x Rux) O12 (x≈0.5)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル