Novel orbital ordering induced by anisotropic stress in a manganite thin film

Y. Wakabayashi, D. Bizen, H. Nakao, Y. Murakami, M. Nakamura, Y. Ogimoto, K. Miyano, H. Sawa

研究成果: Article査読

64 被引用数 (Scopus)

抄録

A novel structure of orbital ordering is found in a Nd0.5Sr0.5MnO3 thin film, which exhibits a clear first-order transition, by synchrotron x-ray diffraction measurements. Lattice parameters vary drastically at the metal-insulator transition at 170Â K (=TMI), and superlattice reflections appear below 140Â K (=TCO). The electronic structure between TMI and TCO is identified as A-type antiferromagnetic with a dx2-y2 ferro-orbital ordering. The new type of antiferro-orbital ordering characterized by the wave vector (141412) in cubic notation emerges below TCO. The accommodation of the large lattice distortion at the first-order phase transition and the appearance of the novel orbital ordering are brought about by the anisotropy in the substrate, a new parameter for the phase control.

本文言語English
論文番号017202
ジャーナルPhysical review letters
96
1
DOI
出版ステータスPublished - 2006 1 13
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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