Large ferroelectric polarization in antiferromagnetic BiFe_0.5Cr_0.5O₃ epitaxial films

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2763964· OSTI ID:930932

Kim, Dae Ho ^[1]; Lee, Ho Nyung ^[1]; Biegalski, Michael D ^[1]; Christen, Hans M ^[1]

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1. ORNL

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 meta-stable 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 for the first time reveal ferroelectric hysteresis with a remanent polarization as high as 56 C/cm2 along the pseudocubic [001] direction.

• Research Organization: Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 930932
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 91; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
BISMUTH OXIDES
CHROMIUM OXIDES
EPITAXY
FERROELECTRIC MATERIALS
FILMS
HYSTERESIS
IRON OXIDES
MAGNETIZATION
POLARIZATION
SOLID SOLUTIONS
SUBSTRATES