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Large ferroelectric polarization in antiferromagnetic BiFe0.5Cr0.5O3 epitaxial films

Appl. Phys. Lett. 91, 042906 (2007); doi:10.1063/1.2763964

Published 26 July 2007

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Dae Ho Kim and Ho Nyung Lee
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

Michael D. Biegalski
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

Hans M. Christen
Materials Science and Technology Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Multiferroic BiFe0.5Cr0.5O3 solid solution epitaxial films were grown by pulsed laser deposition on SrTiO3 (001) substrates with SrRuO3 bottom electrodes. Formation of the metastable composition in the form of high-quality epitaxial films was made possible by a sequential deposition of 0.1 unit cell amounts of BiFeO3 and BiCrO3. The random distribution of Fe and Cr cation results in a linear response of magnetization with varying magnetic field, consistent with a dominant antiferromagnetic order. Polarization measurements at 77.3  K reveal ferroelectric hysteresis with a remanent polarization as high as 60±1  µC/cm2 along the pseudocubic [001] direction. ©2007 American Institute of Physics
History: Received 26 April 2007; accepted 1 July 2007; published 26 July 2007
Permalink: http://link.aip.org/link/?APPLAB/91/042906/1
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KEYWORDS and PACS

Keywords
PACS
  • 77.22.Ej
    Dielectric polarization and depolarization
  • 75.50.Ee
    Antiferromagnetics
  • 75.80.+q
    Magnetomechanical and magnetoelectric effects, magnetostriction
  • 77.80.Dj
    Ferroelectric domain structure; hysteresis
  • 75.70.Ak
    Magnetic properties of monolayers and thin films
  • 75.60.Ej
    Magnetization curves, hysteresis, Barkhausen and related effects
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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