Journal
JOURNAL OF MATERIALS SCIENCE
Volume 44, Issue 19, Pages 5080-5094Publisher
SPRINGER
DOI: 10.1007/s10853-009-3679-1
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Funding
- U. S. Department of Energy [DE.-AC02-98CH10886]
- Office of the Air-Force Office of Scientific Research [FA 9550-06-1-0410]
- National Science Foundation [DMR-0757502]
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Two-phase multiferroic nano-composite thin films have been a topic of research interests in the last few years. This is because of their expected magnetoelectric coupling, as well as potential applications. This review focuses on recent findings in self-assembled nano-structure composite thin films, and various efforts to realize and improve their magnetoelectricity. Topics include: (i) nano-pillar and maze structures, and their formation mechanisms, and a nano-belt structure oriented in-plane found by our research group; (ii) the ferroelectric properties of composite thin films, and how they can be enhanced by epitaxial engineering; (iii) a magnetic anisotropy that is induced by constraint stress, and by the nano-structures of the ferromagnetic phase; and (iv) a magnetoelectric coupling that was first observed via a change in magnetization near the Curie temperature of the ferroelectric phase, a magnetization switching assisted by electric field, and recently direct measurements using a magnetic cantilever method yielding values of 18 mV/cm Oe in BiFeO3-CoFe2O4.
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