Local weak ferromagnetism in single-crystalline ferroelectric BiFeO

M. Ramazanoglu, S.-W. Cheong, V. Kiryukhin, M. Laver, W.C. Chen, A. Jackson, K. Kothapalli, W. Ratcliff, S.M. Watson, S. Lee

Research output: Contribution to journalArticlepeer-review

101 Citations (Scopus)


Polarized small-angle neutron scattering studies of single-crystalline multiferroic BiFeO 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 [11̄0], to several microns along [111], confirming a long-standing theoretical prediction. The average local magnetization is 0.06μ/Fe. Our results provide an indication of the intrinsic macroscopic magnetization to be expected in ferroelectric BiFeO thin films under strain, where the magnetic cycloid is suppressed.
Original languageEnglish
Pages (from-to)207206
Number of pages5
JournalPhysical Review Letters
Issue number20
Publication statusPublished - 11 Nov 2011


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