Manipulating Spin with Acoustic Waves
Prof. Pallavi Dhagat
Oregon State Univ., USA
Date & Time: 10:30 - 11:30, August 29th (Thu), 2019.
Place: 8F Special Reception Room(#801-802), Sengen.
Abstract:
In this seminar, I will present our work and possible ideas for future exploration on manipulating magnetization with acoustic waves.
The temporally and spatially varying strain in acoustic waves produces a corresponding change in the local anisotropy of magnetostrictive materials through the Villari effect. This magneto-acoustic coupling may be used for patterning magnetic films and for nonlinear signal processing such as amplification and correlation of spin waves. I will discuss our experiments and results towards these application possibilities, and also present the techniques we have developed to characterize magnetostriction. As a topic for future exploration (and collaboration), I will discuss the use of the Barnett field, due to the rotational motion in a surface acoustic wave, to manipulate spin in ferromagnets and semiconductors.
The temporally and spatially varying strain in acoustic waves produces a corresponding change in the local anisotropy of magnetostrictive materials through the Villari effect. This magneto-acoustic coupling may be used for patterning magnetic films and for nonlinear signal processing such as amplification and correlation of spin waves. I will discuss our experiments and results towards these application possibilities, and also present the techniques we have developed to characterize magnetostriction. As a topic for future exploration (and collaboration), I will discuss the use of the Barnett field, due to the rotational motion in a surface acoustic wave, to manipulate spin in ferromagnets and semiconductors.