Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites

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Multiferroic materials have driven significant research interest due to their promising technological potential. Developing new room-temperature multiferroics and understanding their fundamental properties are important to reveal unanticipated physical phenomena and potential applications. Here, a new room temperature multiferroic nanocomposite comprised of an ordered ferrimagnetic spinel alpha-LiFe5O8 (LFO) and a ferroelectric perovskite BiFeO3 (BFO) is presented. It is observed that lithium (Li)-doping in BFO favors the formation of LFO spinel as a secondary phase during the synthesis of LixBi1-xFeO3 ceramics. Multimodal functional and chemical imaging methods are used to map the relationship between doping-induced phase separation and local ferroic properties in both the BFO-LFO composite ceramics and self-assembled nanocomposite thin films. The energetics of phase separation in Li doped BFO and the formation of BFO-LFO composites are supported by first principles calculations. These findings shed light on Li's role in the formation of a functionally important room temperature multiferroic and open a new approach in the synthesis of light element doped nanocomposites for future energy, sensing, and memory applications.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2020-01
Language
English
Article Type
Article
Citation

ADVANCED FUNCTIONAL MATERIALS, v.30, no.3, pp.1906849

ISSN
1616-301X
DOI
10.1002/adfm.201906849
URI
http://hdl.handle.net/10203/276861
Appears in Collection
MS-Journal Papers(저널논문)
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