Insulator-metal transition induced by interlayer coupling in la0.6Sr0.4Mno3/srtio3 superlattices

M. Izumi, Y. Ogimoto, Y. Okimoto, T. Manako, P. Ahmet, K. Nakajima, T. Chikyow, M. Kawasaki, Y. Tokura

研究成果: Article査読

96 被引用数 (Scopus)

抄録

The electronic and magnetic properties of perovskite superlattices composed of five unit-cell layers of ferromagnetic metal La0.6Sr0.4MnO3 and nonmagnetic band insulator SrTiO3 with varying layer thickness have been systematically investigated. The superlattices have well-defined periodic stacking with no sign of interlayer diffusion. The spin canting at the interfaces in La0.6Sr0.4MnO3 layers manifests itself as a suppressed magnetization and huge magnetoresistance subsisting to low temperature. The transport properties show a clear crossover from insulating to metallic perhaps by an increase in the interlayer electron hopping through SrTiO3 layers when the SrTiO3 layer thickness is reduced. This crossover is also discerned in the infrared optical spectra as the filling of absorption in the low-energy region.

本文言語English
論文番号064429
ページ(範囲)644291-644296
ページ数6
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
64
6
DOI
出版ステータスPublished - 2001 8 1
外部発表はい

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

「Insulator-metal transition induced by interlayer coupling in la<sub>0.6</sub>Sr<sub>0.4</sub>Mno<sub>3</sub>/srtio<sub>3</sub> superlattices」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。

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