Title: Converse magnetoelectric effect in PZT/NiFe/CoFe nanocomposites

Authors: Nguyen Thi Minh Hong; Nguyen Huu Duc; Pham Duc Thang

Addresses: Laboratory for Micro and Nanotechnology, Faculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, Vietnam National University, Hanoi, Building E3, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam ' Laboratory for Micro and Nanotechnology, Faculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, Vietnam National University, Hanoi, Building E3, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam ' Laboratory for Micro and Nanotechnology, Faculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, Vietnam National University, Hanoi, Building E3, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam

Abstract: Magnetoelectric effect has attracted considerable interest due to the promising approach towards novel spintronics device. In this work, we study the converse magnetoelectric properties of PZT/NiFe/CoFe nanocomposites in which the piezoelectric substrate is transversely polarised and the thickness of the NiFe layer is varied. In these structures, the magnetic behaviour significantly changes under an applied voltage thanks to magnetoelectric coupling between the layers. By changing the NiFe thickness, this change in magnetisation reaches up to 245% at low bias magnetic field. Besides, the investigation of voltage controlled magnetisation switching is expounded. These results are discussed in term of a stress-induced anisotropy field model and magnetoelectric coupling between two phases.

Keywords: nanocomposites; magnetoelectric effect; voltage induced magnetisation; nanotechnology; spintronics devices.

DOI: 10.1504/IJNT.2013.053133

International Journal of Nanotechnology, 2013 Vol.10 No.3/4, pp.206 - 213

Available online: 05 Apr 2013 *

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