The influence of in-plane ferroelectric crystal orientation on electrical modulation of magnetic properties in Co 60Fe 20B 20/SiO 2/(011) xPb(Mg 1/3Nb 2/3)O 3-(1 - X)PbTiO 3 heterostructures

Abstract

(011) cut xPb(Mg 1/3Nb 2/3)O 3-(1 - x)PbTiO 3 (PMN-PT) ferroelectric crystal is usually used in ferroelectric/ferromagnetic (FE/FM) heterostructures due to its strong voltage-induced anisotropic in-plane strain. (011) PMN-PT crystal includes two in-plane crystal orientations, 100 and 01 - 1, with different piezoelectric strength resulting in anisotropic in-plane strain. Few systematic studies have been conducted to determine the influence of in-plane orientation on magnetoelectric (ME) coupling characteristic in ferroelectric/ferromagnetic composites. In this paper, we report our work to distinguish the contributions of in-plane orientations on electric modulation of magnetic properties. Magneto-optical Kerr effect and propagating spin wave spectroscopy are measured to define the influence of in-plane orientations on electric control of magnetic parameters and spin wave propagation. Magnetoelectric coupling coefficients and frequency modulation coefficients are also calculated. © 2012 American Institute of Physics.