Probing of ferroelectric and antiferromagnetic orders of multiferroic YMnO$_{3}$ via second harmonic generation
ORAL
Abstract
The ferroelectric and antiferromagnetic properties of epitaxial, hexagonal (0001) YMnO$_{3}$ thin films grown on GaN/Al$_{2}$O$_{3}$ substrates were studied using second harmonic generation. A Ti:sapphire laser with a 15 W Nd:YVO$_{4}$ pump was used to generate the second harmonic signal. Above the N\'{e}el temperature, ferroelectric ordering was clearly observed as deduced from angular plots of the incoming and outgoing polarization of the second harmonic generation (SHG) signals. Additional antiferromagnetic order was identified below the N\'{e}el temperature. The ferroelectric-magnetic coupling studied via SHG will be discussed.
*This work was supported in part by the Office of Naval Research and the National Science Foundation
–