NDLI: Structural evolution from Bi4.2K0.8Fe2O9+δ nanobelts to BiFeO3 nanochains in vacuum and their multiferroic properties

Content Provider	Royal Society of Chemistry (RSC)
Author	Yin, Yuewei Zhang, Dalong Liu, Yukuai Li, Xiaoguang Jiang, Tao Dong, Sining Yang, Shengwei
Copyright Year	2014
Abstract	In this paper, we report the structural evolution of Bi4.2K0.8Fe2O9+δ nanobelts to BiFeO3 nanochains and the related variations in multiferroic properties. By using in situ transmission electron microscopy with comprehensive characterization, it was found that the layered perovskite multiferroic Bi4.2K0.8Fe2O9+δ nanobelts were very unstable in a vacuum environment, with Bi being easily removed. Based on this finding, a simple vacuum annealing method was designed which successfully transformed the Bi4.2K0.8Fe2O9+δ nanobelts into one-dimensional BiFeO3 nanochains. Both the Bi4.2K0.8Fe2O9+δ nanobelts and the BiFeO3 nanochains showed multiferroic behavior, with their ferroelectric and ferromagnetic properties clearly established by piezoresponse and magnetic measurements, respectively. Interestingly, the BiFeO3 nanochains had a larger magnetization than the Bi4.2K0.8Fe2O9+δ nanobelts. Moreover, the BiFeO3 nanochains exhibited a surprisingly large exchange bias with small training effects. This one-dimensional BiFeO3 multiferroic nanostructure characterized by a relatively stable exchange bias offers important functionalities that may be attractive for device applications.
Starting Page	14766
Ending Page	14771
Page Count	6
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	24
Journal	Nanoscale
DOI	10.1039/c4nr03148b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Perovskite Transmission electron microscopy Ferroelectricity Bi Bismuth ferrite Ferromagnetism Nanostructure Nucleic acid thermodynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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