Magnetization switching by microwaves synchronized in the vicinity of precession frequency

Abstract

We propose a theoretical framework of a magnetization switching induced solely by a microwave. The microwave frequency is always close to but slightly different from the oscillation frequency of the magnetization. By efficiently absorbing energy from the microwave, the magnetization climbs up the energy landscape to synchronize the precession with the microwave. We introduced a dimensionless parameter $\epsilon$ determining the difference between the microwave frequency and the instant oscillation frequency of the magnetization. We analytically derived the condition of $\epsilon$ to switch the magnetization, and confirmed its validity by the comparison with numerical simulations.

5 pages, 4 figures

References in corpus (2)

• Magnetization reversal condition for a nanomagnet within a rotating magnetic field
• Numerical Study on Spin Torque Switching in Thermally Activated Region

Cited by in corpus (4)

• An analytical computation of magnetic field generated from a cylinder ferromagnet
• Magnetization switching by current and microwaves
• Transition state theory characterizes thin film macrospin dynamics driven by an oscillatory magnetic field: Inertial effects
• Transition state dynamics of a driven magnetic free layer