Intrinsic colossal magnetoresistance effect in thin-film Pr0.5Sr0.5MnO3 through dimensionality switching

Y. Uozu, Y. Wakabayashi, Y. Ogimoto, N. Takubo, H. Tamaru, N. Nagaosa, K. Miyano

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26 Citations (Scopus)

Abstract

A homogeneous colossal magnetoresistance (CMR) effect at low temperatures has been found in a thin-film perovskite manganite Pr0.5Sr0.5MnO3. The transition is driven not by the spin alignment as in usual CMR in bulk samples but by the localization-delocalization transition switched by the change in the effective dimensionality. Two-dimensional (x2-y2)-orbital ordering enhanced by the substrate strain is essential for the stabilization of the insulating localized state, which is on the verge of the first-order transition to the three-dimensional metallic ferromangetic state.

Original languageEnglish
Article number037202
JournalPhysical Review Letters
Volume97
Issue number3
DOIs
Publication statusPublished - 2006 Jul 24
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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