Multi-Particle Dynamics in Strain Mediated Multiferroics

ORAL

Abstract

Strain mediated multiferroics has opened the possibility of localized control of the magnetization vector which in turn allows for soft-magnetic nanoparticle manipulation with high precision. No dynamic model exists to simulate the full multi-particle dynamics in multiferroic systems. This work focuses on developing a 3D multi-body model of magnetic particle motion driven by magnetic forces, particle repulsive forces, frictional forces, fluid drag and adhesion forces considering asperities. Magnetic forces and particle repulsive force were evaluated directly from the finite difference model by post-processing the output nodal fields. Other forces were calculated using analytical expressions. The system studied in this work is a FeGa disk on a PZT substrate. First, we studied the particle distribution when the magnetization is static. The results show good agreement with previous experimental data. Next, the dynamic distribution of particles was studied with the magnetization rotating at constant angular velocity, comparing the distribution under different angular velocities. Particle distribution highly depends on the magnetic properties and particle number. We believe that this is the first model to predict multi-particle dynamics in multiferroic systems with full 3D dynamics.

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Presenters

  • Robert Dyro

    Mechanical and Aerospace Engineering, University of California, Los Angeles

Authors

  • Robert Dyro

    Mechanical and Aerospace Engineering, University 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

  • 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