Low temperature magnetic imaging of strained multiferroic EuTiO$_3$ thin films

ORAL

Abstract

It has been predicted that the competition between paraelectric antiferromagnetic state and ferroelectric ferromagnetic state in perovskite EuTiO$_3$ can be tuned by epitaxial strain.\footnote{C.J. Fennie and K.M. Rabe, Phys. Rev. Lett. 97, 267602 (2006).} Tensile-strained EuTiO$_3$ thin films grown on DyScO$_3$ (110) substrate by molecular-beam epitaxy are confirmed to be ferromagnetic at low temperature by magnetometry and magneto-capacitance. Here we present magnetic imaging of EuTiO$_3$/DyScO$_3$ thin film using low temperature magnetic force microscopy (LT-MFM). Temperature dependence of MFM contrast confirms the ferromagnetic ground state. The magnetic field dependence of MFM images will be discussed in conjunction with magnetometry and magneto-capacitance measurements.

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Authors

  • Yanan Geng

  • Weida Wu

    Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, Rutgers University, Rutgers Center for Emergent Materials \& Department of Physics and Astronomy, Rutgers University

  • John W. Freeland

    Advanced Photon Source, Argonne National Laboratory, Argonne National Laboratory

  • Philip Ryan

    Argonne National Laboratory

  • Jong Woo Kim

    Argonne National Laboratory, Advanced Photon Source, Argonne National Laboratory, Argonnne, IL

  • X. Ke

    Oak Ridge National Laboratory

  • P. Schiffer

    Pennsylvania State University, Department of Physics and Materials Research Institute

  • J.H. Lee

  • Darrell Schlom

    Cornell University, Cornel University, Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania, Department of Materials Science and Engineering, Cornell University

  • Craig Fennie

    Cornell, School of Applied and Engineering Physics, Department of Applied and Engineering Physics, Cornell University, Ithaca, New York, School of Applied and Engineering Physics, Cornell University