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ENHANCED MULTIFERROIC PROPERTIES OF La-DOPED BiFeO₃ NANOTUBES FABRICATED THROUGH ANODIC ALUMINA TEMPLATE METHOD

Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P. R. China

Faculty of Physics and Electronic Technology, Hubei University, 430062 Wuhan, P. R. China

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YAN WANG

Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P. R. China

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JI-YAN DAI

Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P. R. China

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DI ZHOU

Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P. R. China

Faculty of Physics and Electronic Technology, Hubei University, 430062 Wuhan, P. R. China

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YONG-MING HU

Faculty of Physics and Electronic Technology, Hubei University, 430062 Wuhan, P. R. China

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HAO-SHUANG GU

Faculty of Physics and Electronic Technology, Hubei University, 430062 Wuhan, P. R. China

Corresponding authors.

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, and

KARIM Z. BABA-KISHI

Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P. R. China

Corresponding authors.

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https://doi.org/10.1142/S2010135X11000410Cited by:5 (Source: Crossref)

Abstract

Bi_0.85La_0.15FeO₃ (BLFO) nanotubes with an average diameter of about 200 nm and wall thickness of about 20 nm are fabricated by sol–gel alumina template technique, and their room-temperature multiferroic properties are studied. Piezoelectricity and ferroelectricity in the BLFO nanotubes are revealed by piezoresponse force microscopy study of individual nanotube. Doping the BiFeO₃ nanotubes with La reduces the crystallization temperature and results in a reduced lose of Bi and therefore improved multiferroic properties of the nanotubes. Enhanced weak ferromagnetism is also observed, and it is attributed to the nano-crystalline structure of the nanotubes.

Keywords:

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