Deterministic Magnetization Rotation in Nano Magnetoelastic Rings

POSTER

Abstract

Realizing deterministic magnetization rotation remains a challenging problem in multiferroic system. This work examines conditions required for deterministic magnetization rotation in a Nickel ring with dimensions: inner radius 350 nm, outer radius 500 nm. The ring is on top a piezoelectric substrate where electrodes are placed to induce in-plane stresses. The study determines how strains must be applied to have magnetization rotation at const. angular speed. The in-plane flexibility of rings makes it difficult to induce the correct strain profile for rotation. Since the ring is made of Ni which is negative magnetostrictive, we determine the attraction area of influence (i.e. how far can the magnetization rotates from induced strain location) for each electrode as a function of applied voltage, electrode config. and rigidity of inner core. Parametric studies determine speed of rotation (when it does) and the input energy required. These results are then used to determine optimal electrode geometry and the way in which strains should be applied. This work will provide practical framework for the design of actuation systems for the control of the magnetization in rings. Multiple applications in the field of nano-motors are envisioned, for example cell manipulation.

Presenters

  • Cai Chen

    Mechanical and Aerospace Engineering, University of California, Los Angeles, Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Univ of California - Los Angeles

Authors

  • Abdon Sepulveda

    MAE Department, UCLA, Mechanical and Aerospace Engineering, University of California, Los Angeles, Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Mechanical and Aerospace Engineering Department, Univ of California - Los Angeles, Univ of California - Los Angeles

  • Cai Chen

    Mechanical and Aerospace Engineering, University of California, Los Angeles, Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Univ of California - Los Angeles

  • Greg Carman

    Department of Mechanical and Aerospace Engineering, UCLA, MAE Department, UCLA, Mechanical and Aerospace Engineering, University of California, Los Angeles, Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Mechanical and Aerospace Engineering Department, Univ of California - Los Angeles, Univ of California - Los Angeles, Department of Mechanical and Aerospace Engineering, University of California, Los Angeles

  • Jin-Zhao Hu

    MAE Department, UCLA, Univ of California - Los Angeles

  • Kevin Landry

    Univ of California - Los Angeles