The 294th Special CMSM seminar

Numerical modeling of magnetic materials and devices: Multiphysics formulations and high-performance simulators

Prof. Vitaliy Lomakin
University of California, San Diego
Date & Time: 15:00 - 16:00, December 11th (Thu), 2025.
Place: Room#513-514, Advanced Structural Materials Bldg. 5F, Sengen.

Abstract:

Magnetic materials and devices play a critical role in modern physics and engineering applications, driving the need for advanced numerical tools capable of modeling complex interactions and guiding device design. Realistic micromagnetic modeling relies on the integration of accurate physical formulations, solid mathematical foundations, and high-performance numerical algorithms. In this seminar, we present recent advances in multiphysics micromagnetic modeling. At the formulation level, we highlight the significance of coupling diverse physical phenomena to capture complex behaviors in magnetic systems. Examples include coupling the Landau–Lifshitz–Gilbert (LLG) equation with Maxwell’s equations to model eddy-current dynamics, as well as magnetoelastic formulations that couple the LLG equation with elasticity theory to account for magnetostriction, inverse magnetostriction, magnon–phonon interactions, and strain-induced magnetization states. From the numerical perspective, we discuss high-performance finite-element implementations of these multiphysics formulations, emphasizing efficient computation of effective fields, time integration strategies, and scalable solvers. Finally, we demonstrate the capabilities of these computational tools in modeling a wide range of realistic magnetic systems, including magnetic write heads, granular magnetic media, magnetic memories with granularity and interfacial roughness, large arrays of spin-torque and spin-Hall oscillators, magnonic structures, and soft magnetic materials.

(Contact)

Anton Bolyachkin
Researcher, Green Magnetic Materials Group
Research Center for Magnetic and Spintronic Materials (CMSM)
E-mail: BOLYACHKIN.Anton[at]nims.go.jp