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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.
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 October 8, 2025)