Magnetoelectric quasi-(0-3) nanocomposite heterostructures

Yanxi Li (), Zhongchang Wang (), Jianjun Yao, Tiannan Yang, Zhiguang Wang, Jia-Mian Hu, Chunlin Chen, Rong Sun, Zhipeng Tian, Jiefang Li, Long-Qing Chen and Dwight Viehland
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Yanxi Li: Virginia Tech
Zhongchang Wang: Advanced Institute for Materials Research, Tohoku University
Jianjun Yao: Virginia Tech
Tiannan Yang: Pennsylvania State University
Zhiguang Wang: Virginia Tech
Jia-Mian Hu: Pennsylvania State University
Chunlin Chen: Advanced Institute for Materials Research, Tohoku University
Rong Sun: Institute of Engineering Innovation, The University of Tokyo
Zhipeng Tian: Virginia Tech
Jiefang Li: Virginia Tech
Long-Qing Chen: Pennsylvania State University
Dwight Viehland: Virginia Tech

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Magnetoelectric composite thin films hold substantial promise for applications in novel multifunctional devices. However, there are presently shortcomings for both the extensively studied bilayer epitaxial (2-2) and vertically architectured nanocomposite (1-3) film systems, restricting their applications. Here we design a novel growth strategy to fabricate an architectured nanocomposite heterostructure with magnetic quasiparticles (0) embedded in a ferroelectric film matrix (3) by alternately growing (2-2) and (1-3) layers within the film. The new heteroepitaxial films not only overcome the clamping effect from substrate, but also significantly suppress the leakage current paths through the ferromagnetic phase. We demonstrate, by focusing on switching characteristics of the piezoresponse, that the heterostructure shows magnetic field dependence of piezoelectricity due to the improved coupling enabled by good connectivity amongst the piezoelectric and magnetostrictive phases. This new architectured magnetoelectric heterostructures may open a new avenue for applications of magnetoelectric films in micro-devices.

Date: 2015
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DOI: 10.1038/ncomms7680

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