Ferromagnetism in multiferroic BiFeO3 films: A first-principles-based study

Physical Review B - Condensed Matter and Materials Physics

Volumn 81, Issue 14, 2010, Pages

  Albrecht, D ^a   Lisenkov, S ^b   Ren, Wei ^a   Rahmedov, D ^a   Kornev, Igor A ^c   Bellaiche, L ^a  

^a UNIVERSITY OF ARKANSAS   (United States)

^b UNIVERSITY OF SOUTH FLORIDA   (United States)

^c ECOLE CENTRALE PARIS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77955199073     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.81.140401     Document Type: Article

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41. Above 20 Tesla, the cycloidal spin structure of BFO bulk is destroyed in favor of a structure that exhibits a weak magnetization whose magnitude depends on the applied field (Ref.).
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43. B may be due to a large fraction of uncompensated spins from the surfaces (Ref.)]. Note that our results cannot rule out the possibility of surface-induced magnetism in BFO nanostructures since such subtle effect is not incorporated in our calculations-mostly because it is likely dependent on the choice of electrodes sandwiching the films or the amount and chemical identity of the absorbants present at the surfaces. However, the fact that our predicted weak magnetization in BFO films is very close to that observed in Refs. strongly suggests that intrinsic surface-induced magnetism is negligible in BFO nanostructures.