Piezoelectric control of magnetic dynamics in Co/Pb(Mg1/3Nb 2/3)O3-PbTiO3 heterostructure

Abstract

A microstrip method with vector network analyzer was used to investigate electric field control of magnetic dynamic properties in Co/Pb(Mg 1/3Nb2/3)O3-PbTiO3 heterostructure at room temperature. Under external electric field, the natural resonance frequency and permeability of the Co film were found to modulate between 1.8-2.8GHz and 50-150, respectively. In addition, the in-plane uniaxial magnetic anisotropy field can also be electrically tuned from 54 to 170Oe, while the ferromagnetic resonance field was substantially enhanced about 350Oe as well. Such an improvement of magnetic anisotropy is desirable for effectively electric control of resonance frequency and permeability in low energy microwave devices. © 2014 AIP Publishing LLC.