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

被引：52
|
作者：
Kim, Dae Ho
Lee, Ho Nyung
Biegalski, Michael D.
Christen, Hans M.
机构：
[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[2] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA
[3] Oak Ridge Natl Lab, Div Mat Sci & Technol, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 04期
关键词：
Antiferromagnetic materials - Crystal growth - Magnetization - Polarization - Pulsed laser deposition - Solid solutions;
D O I：
10.1063/1.2763964
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 mu C/cm(2) along the pseudocubic [001] direction. (C) 2007 American Institute of Physics.
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页数：3
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