Large ferroelectric polarization in antiferromagnetic BiFe 0.5Cr0.5O3 epitaxial films

Dae Ho Kim; Ho Nyung Lee; Michael D. Biegalski; Hans M. Christen

doi:10.1063/1.2763964

Large ferroelectric polarization in antiferromagnetic BiFe _0.5Cr_0.5O₃ epitaxial films

Dae Ho Kim, Ho Nyung Lee, Michael D. Biegalski, Hans M. Christen

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

Multiferroic Bi Fe0.5 Cr0.5 O3 solid solution epitaxial films were grown by pulsed laser deposition on SrTi O3 (001) substrates with SrRu O3 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 BiFe O3 and BiCr O3. 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.

Original language	English
Article number	042906
Journal	Applied Physics Letters
Volume	91
Issue number	4
DOIs	https://doi.org/10.1063/1.2763964
State	Published - 2007

Funding

The authors thank D. H. Lowndes and M. Varela for valuable discussions and P. H. Fleming for technical assistance. Research was sponsored by the Division of Materials Sciences and Engineering (D.H.K., H.N.L., and H.M.C.) and the Division of Scientific User Facilities (M.D.B.), Basic Energy Sciences, U.S. Department of Energy.

Funders	Funder number
U.S. Department of Energy
Basic Energy Sciences
Division of Materials Sciences and Engineering

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abstract = "Multiferroic Bi Fe0.5 Cr0.5 O3 solid solution epitaxial films were grown by pulsed laser deposition on SrTi O3 (001) substrates with SrRu O3 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 BiFe O3 and BiCr O3. 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.",

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AU - Kim, Dae Ho

AU - Lee, Ho Nyung

AU - Biegalski, Michael D.

AU - Christen, Hans M.

PY - 2007

Y1 - 2007

N2 - Multiferroic Bi Fe0.5 Cr0.5 O3 solid solution epitaxial films were grown by pulsed laser deposition on SrTi O3 (001) substrates with SrRu O3 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 BiFe O3 and BiCr O3. 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.

AB - Multiferroic Bi Fe0.5 Cr0.5 O3 solid solution epitaxial films were grown by pulsed laser deposition on SrTi O3 (001) substrates with SrRu O3 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 BiFe O3 and BiCr O3. 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.

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Large ferroelectric polarization in antiferromagnetic BiFe _0.5Cr_0.5O₃ epitaxial films

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