Surface-effect enhanced magneto-electric coupling in FePt/PMN-PT multiferroic heterostructures
Y. T. Yang,
J. Li,
X. L. Peng,
B. Hong,
X. Q. Wang,
H. L. Ge,
D. H. Wang,
Y. W. Du
Affiliations
Y. T. Yang
College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, People’s Republic of China
J. Li
College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, People’s Republic of China
X. L. Peng
College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, People’s Republic of China
B. Hong
College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, People’s Republic of China
X. Q. Wang
College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, People’s Republic of China
H. L. Ge
College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, People’s Republic of China
D. H. Wang
National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing 210093, People’s Republic of China
Y. W. Du
National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing 210093, People’s Republic of China
A series of FePt films with different film thickness are deposited on Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN-PT) substrates. A standard symmetric ‘Butterfly’ shaped ΔM/M-Edc loops is obtained in 8 nm FePt/PMN-PT heterostrucuture via strain mediated magnetoelectric coupling. For the 3 nm FePt/PMN-PT heterostructure, the loop-like in-plane magnetization (M) -E curve shares a similar shape with the electric polarization of PMN-PT as a function of electric field. The value of MS shows a dramatic change of 30.9% with Edc changing from 0 to 8 kV/cm, this giant magnetoelectric effect in 3 nm FePt/PMN-PT heterostructure results from the remnant polarization induced charge on FePt/PMN-PT interface via the screening charge effect. The enhanced magnetoelectric coupling in thin magnetic/ferroelectric heterostructures opens a promising avenue for the design of ultralow power magnetoelectric devices and information storage devices.
