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Local Weak Ferromagnetism in Single-Crystalline Ferroelectric BiFeO3

Published

Author(s)

M. Ramazanoglu, M. Laver, William D. Ratcliff, Shannon M. Watson, Wangchun Chen, Andrew Jackson, Karunakar NMN Kothapalli, Seongsu Lee, S.- W. Cheong, V. Kiryukhin

Abstract

Polarized small-angle neutron scattering studies of single-crystalline multiferroic BefeO3 reveal a long-wavelength spin density wave generated by 1° spin canting of the spins out of the rotation plane of the antiferromagnetic cycloidal order. This signifies weak ferromagnetism within mesoscopic regions of dimension 0.03 microns along [110}, to several microns along [111], confirming a long-standing theoretical prediction. The average local magnetization is 0.06 υΒ/Fe. Our results provide an indication of the intrinsic macroscopic magnetization to be expected in ferroelectric BFO thin films under strain, where the magnetic cycloid is suppressed.
Citation
Physical Review Letters
Volume
107
Issue
20

Keywords

multiferroic, magnetism, ferroelectricity

Citation

Ramazanoglu, M. , Laver, M. , Ratcliff, W. , Watson, S. , Chen, W. , Jackson, A. , Kothapalli, K. , Lee, S. , Cheong, S. and Kiryukhin, V. (2011), Local Weak Ferromagnetism in Single-Crystalline Ferroelectric BiFeO<sub>3</sub>, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909244 (Accessed December 4, 2021)
Created October 31, 2011, Updated October 12, 2021