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Title: Novel Orbital Ordering Induced by Anisotropic Stress in a Manganite Thin Film

Abstract

A novel structure of orbital ordering is found in a Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3} 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 (=T{sub MI}), and superlattice reflections appear below 140 K (=T{sub CO}). The electronic structure between T{sub MI} and T{sub CO} is identified as A-type antiferromagnetic with a d{sub x{sup 2}-y{sup 2}} ferro-orbital ordering. The new type of antiferro-orbital ordering characterized by the wave vector ((1/4)(1/4)(1/2)) in cubic notation emerges below T{sub CO}. 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.

Authors:
;  [1]; ;  [2];  [2];  [3];  [4];  [5];  [6]
  1. Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801 (Japan)
  2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  3. (Japan)
  4. Department of Applied Physics, University of Tokyo, Tokyo 113-8586 (Japan)
  5. Devices Technology Research Laboratories, SHARP Corporation, Nara 632-8567 (Japan)
  6. Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904 (Japan)
Publication Date:
OSTI Identifier:
20775024
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.96.017202; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; ELECTRONIC STRUCTURE; LATTICE PARAMETERS; MANGANESE OXIDES; NEODYMIUM COMPOUNDS; PHASE TRANSFORMATIONS; STRESSES; STRONTIUM COMPOUNDS; SUBSTRATES; SUPERLATTICES; TEMPERATURE RANGE 0065-0273 K; THIN FILMS; TRANSITION TEMPERATURE; X-RAY DIFFRACTION

Citation Formats

Wakabayashi, Y., Sawa, H., Bizen, D., Nakao, H., Murakami, Y., Synchrotron Radiation Research Center, JAERI, Sayo 679-5148, Nakamura, M., Ogimoto, Y., and Miyano, K.. Novel Orbital Ordering Induced by Anisotropic Stress in a Manganite Thin Film. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.017202.
Wakabayashi, Y., Sawa, H., Bizen, D., Nakao, H., Murakami, Y., Synchrotron Radiation Research Center, JAERI, Sayo 679-5148, Nakamura, M., Ogimoto, Y., & Miyano, K.. Novel Orbital Ordering Induced by Anisotropic Stress in a Manganite Thin Film. United States. doi:10.1103/PhysRevLett.96.017202.
Wakabayashi, Y., Sawa, H., Bizen, D., Nakao, H., Murakami, Y., Synchrotron Radiation Research Center, JAERI, Sayo 679-5148, Nakamura, M., Ogimoto, Y., and Miyano, K.. Fri . "Novel Orbital Ordering Induced by Anisotropic Stress in a Manganite Thin Film". United States. doi:10.1103/PhysRevLett.96.017202.
@article{osti_20775024,
title = {Novel Orbital Ordering Induced by Anisotropic Stress in a Manganite Thin Film},
author = {Wakabayashi, Y. and Sawa, H. and Bizen, D. and Nakao, H. and Murakami, Y. and Synchrotron Radiation Research Center, JAERI, Sayo 679-5148 and Nakamura, M. and Ogimoto, Y. and Miyano, K.},
abstractNote = {A novel structure of orbital ordering is found in a Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3} 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 (=T{sub MI}), and superlattice reflections appear below 140 K (=T{sub CO}). The electronic structure between T{sub MI} and T{sub CO} is identified as A-type antiferromagnetic with a d{sub x{sup 2}-y{sup 2}} ferro-orbital ordering. The new type of antiferro-orbital ordering characterized by the wave vector ((1/4)(1/4)(1/2)) in cubic notation emerges below T{sub CO}. 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.},
doi = {10.1103/PhysRevLett.96.017202},
journal = {Physical Review Letters},
number = 1,
volume = 96,
place = {United States},
year = {Fri Jan 13 00:00:00 EST 2006},
month = {Fri Jan 13 00:00:00 EST 2006}
}