Phys. Rev. Lett. 96, 017202 (2006) [4 pages]
Novel Orbital Ordering Induced by Anisotropic Stress in a Manganite Thin Film
Abstract
References (20)
Citing Articles
Y. Wakabayashi, 1 D. Bizen, 2 H. Nakao, 2 Y. Murakami, 2,3 M. Nakamura, 4 Y. Ogimoto, 5 K. Miyano, 6 and H. Sawa11Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
2Department of Physics, Tohoku University, Sendai 980-8578, Japan
3Synchrotron Radiation Research Center, JAERI, Sayo 679-5148, Japan
4Department of Applied Physics, University of Tokyo, Tokyo 113-8586, Japan
5Devices Technology Research Laboratories, SHARP Corporation, Nara 632-8567, Japan
6Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904, Japan
Received 15 June 2005; published 4 January 2006
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 170 K (=TMI), and superlattice reflections appear below 140 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 (  ) 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.
©2006 The American Physical Society
| URL: |
http://link.aps.org/doi/10.1103/PhysRevLett.96.017202
|
| DOI: |
10.1103/PhysRevLett.96.017202 |
| PACS: |
75.70.-i;
61.10.Nz;
75.47.Lx
|
| KEYWORDS: |
lattice constants,
stress effects,
magnetic thin films,
neodymium compounds,
strontium compounds,
X-ray diffraction,
metal-insulator transition,
electronic structure,
antiferromagnetic materials,
magnetic transitions,
magnetic anisotropy
|
REFERENCES (20)
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