Checkerboard pattern formation in spinel oxide films

ORAL

Abstract

A few-nanometer-size columnar superlattice with a checkerboard (CB) structure has been fabricated by harnessing Jahn-Teller structural distortions$^{1,2}$. In this talk, we will discuss the growth mechanism of the CB structures in thin films, obtained from the results of our transmission electron microscopy. Ionic diffusion for the phase separation occurs along the direction parallel to the twin boundaries in the high-temperature tetragonal phase. This anisotropic phase separation suggests the importance of the strain associated with the twin structure in the high-temperature tetragonal phase. 1. S. Yeo \textit{et al.}, Appl. Phys. Lett. \textbf{89}, 233120 (2006). 2. C. L. Zhang \textit{et al}., Appl. Phys. Lett. \textbf{90}, 133123 (2007).

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Authors

  • Toshihiro Asada

    NISSAN ARC, LTD., Rutgers Univ.

  • Y. Horibe

    Rutgers Univ., Rutgers University

  • S. Park

    Rutgers Univ., Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Nara Lee

    Rutgers Univ.

  • Makoto Tanimura

    NISSAN ARC, LTD.

  • S.-W. Cheong

    Rutgers University, RCEM and Rutgers University, Piscataway, NJ, Rutgers University (Deparment of Physics), Rutgers Univ., Department of Physics and Astronomy, Rutgers University, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA, Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA, Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854