Volume 111, Number 1, July 2015
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||29 July 2015|
Magnetoelectric coupling in multiferroic BaTiO3-CoFe2O4 composite nanofibers via electrospinning
1 MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, and Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi'an Jiaotong University - 710049, Xi'an, PRC
2 Department of Electrical and Computer Engineering, Kettering University - 48504, Flint, MI, USA
3 State Key Laboratory for Manufacturing Engineering, Xi'an Jiaotong University - 710049, Xi'an, PRC
Received: 5 June 2015
Accepted: 6 July 2015
Magnetoelectric (ME) coupling in Pb-based multiferroic composites has been widely investigated due to the excellent piezoelectric property of lead zirconate titanate (PZT). In this letter, we report a strategy to create a hybrid Pb-free ferroelectric and ferromagnetic material and detect its ME coupling at the nanoscale. Hybrid Pb-free multiferroic BaTiO3-CoFe2O4 (BTO-CFO) composite nanofibers (NFs) were generated by sol-gel electrospinning. The perovskite structure of BTO and the spinel structure of CFO nanograins were homogenously distributed in the composite NFs and verified by bright-field transmission electron microscopy observations along the perovskite  zone axis. Multiferroicity was confirmed by amplitude-voltage butterfly curves and magnetic hysteresis loops. ME coupling was observed in terms of a singularity on a dM/dT curve at the ferroelectric Curie temperature of BaTiO3. The lateral ME coefficient was investigated by the evolution of the piezoresponse under an external magnetic field of 1000 Oe and was estimated to be . These findings could enable the creation of nanoscale Pb-free multiferroic composite devices.
PACS: 75.85.+t – Magnetoelectric effects, multiferroics / 77.65.Bn – Piezoelectric and electrostrictive constants / 77.80.bn – Strain and interface effects
© EPLA, 2015
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