TY - JOUR
T1 - Novel orbital ordering induced by anisotropic stress in a manganite thin film
AU - Wakabayashi, Y.
AU - Bizen, D.
AU - Nakao, H.
AU - Murakami, Y.
AU - Nakamura, M.
AU - Ogimoto, Y.
AU - Miyano, K.
AU - Sawa, H.
PY - 2006/1/13
Y1 - 2006/1/13
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.96.017202
DO - 10.1103/PhysRevLett.96.017202
M3 - Article
AN - SCOPUS:32644461206
VL - 96
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 1
M1 - 017202
ER -