Valence instability of cerium under pressure in the Kondo-like perovskite La0.1 Ce0.4 Sr0.5 Mn O3

T. Eto, A. Sundaresan, F. Honda, G. Oomi

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

The effects of hydrostatic pressure and magnetic field on the electrical resistance of the Kondo-like perovskite manganese oxide, La0.1 Ce0.4 Sr0.5 Mn O3 with a ferrimagnetic ground state, have been investigated up to 2.1 GPa and 9 T. In this compound, the Mn moments undergo a double exchange mediated ferromagnetic ordering at TC ∼280 K and there is a resistance maximum, Tmax at about 130 K, which is correlated with an antiferromagnetic ordering of cerium with respect to the Mn-sublattice moments. Under pressure, the Tmax shifts to lower temperatures at a rate of d Tmax dP=-162 K GPa and disappears at a critical pressure Pc ∼0.9 GPa. Further, the coefficient, m of -ln T term due to Kondo scattering decreases linearly with increase of pressure showing an inflection point in the vicinity of Pc. These results suggest that cerium undergoes a transition from Ce3+ state to a Ce4+ Ce3+ mixed valence state under pressure. In contrast to the pressure effect, the applied magnetic field shifts Tmax to higher temperatures, presumably due to enhanced ferromagnetic Mn moments.

本文言語英語
論文番号060402
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
72
6
DOI
出版ステータス出版済み - 8 1 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • 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

「Valence instability of cerium under pressure in the Kondo-like perovskite La0.1 Ce0.4 Sr0.5 Mn O3」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