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Stiff modes in spinvalve simulations with OOMMF.

Spyridon Mitropoulos1, Vassilis Tsiantos2, Kyriakos Ovaliadis2

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Physica. B, Condensed Matter
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Micromagnetic simulations of spin valves reveal stiff modes. Implicit numerical methods, like Backward Differentiation Formulae (BDF), are more effective than explicit methods for these dynamic simulations.

Keywords:
ODEsmicromagnetic simulationsspinvalvestiffness

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Area of Science:

  • Computational physics
  • Materials science
  • Magnetism

Background:

  • Micromagnetic simulations are crucial for understanding magnetic materials.
  • Software employs various numerical techniques to solve differential equations for dynamic simulations.

Purpose of the Study:

  • To investigate spin valve simulations using micromagnetic modeling.
  • To evaluate the effectiveness of different numerical methods for stiff systems.

Main Methods:

  • Utilized micromagnetic simulations.
  • Compared explicit numerical methods (Euler, Runge-Kutta, Adams) with implicit methods (Backward Differentiation Formulae - BDF).

Main Results:

  • Spin valve systems exhibit stiff modes.
  • Implicit methods, specifically BDF, demonstrated superior effectiveness in handling these stiff modes compared to explicit methods.

Conclusions:

  • Implicit numerical methods are more suitable for dynamic micromagnetic simulations of spin valves with stiff modes.
  • The choice of numerical method significantly impacts simulation efficiency and accuracy for such systems.