Nanoscale magnetoelectric coupling in multiferroic BiFeO3 nanowires

被引：56
|
作者：
Prashanthi, K. [1 ]
Shaibani, P. M. [1 ]
Sohrabi, A. [1 ]
Natarajan, T. S. [2 ]
Thundat, T. [1 ]
机构：
[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB, Canada
[2] Indian Inst Technol, Dept Phys, Madras 600036, Tamil Nadu, India
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2012年 / 6卷 / 06期
关键词：
BiFeO3; magnetic force microscopy; MFM; multiferroics; magnetoelectric effects; MAGNETIC FORCE MICROSCOPY;
D O I：
10.1002/pssr.201206135
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanoscale magnetoelectric (ME) coupling has been observed in multiferroic BiFeO3 (BFO) nanowires (NWs) synthesized by sol-gel based electrospinning technique. Under externally imposed electric fields these NWs exhibit the systematic evolution of a magnetic domain pattern as established by magnetic force microscopy (MFM), confirming the presence of ME coupling. Interestingly, the effect persists even after the electric field is removed, thereby implying an electric-field-induced magnetic hysteresis phenomenon in BFO NWs. The estimated ME coupling coefficient from tip-sample interactions is alpha(33) = 2.2 x 10(-10) sm(-1), and the equivalent ME voltage coefficient is 0.49 V cm(-1) Oe(-1). The obtained values of the ME coupling coefficient are higher than the reported values for BFO bulk and thin films. These results promise one-dimensional (1D) multiferroic BFO NWs as potential candidate for manipulating magnetism through electric field at the nanoscale and provide great opportunities towards magnetoelectrically tunable multiferroic devices. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：244 / 246
页数：3
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