Switching Time of Magnetic Moment Driven by Circularly Polarized Field

Authors A.Yu. Polyakov

Sumy State University, 2, Rymsky Korsakov Str., 40007 Sumy, Ukraine

Е-mail alexander.p1987@gmail.com
Issue Volume 4, Year 2012, Number 3
Dates Received 30 August 2012; revised manuscript received 11 October 2012; published online 30 October 2012
Citation English version unavailable
PACS Number(s) 05.10.Ln; 75.50.Tt; 75.75. + a; 75.60. – d
Keywords Ferromagnetic nanoparticle, Magnetic moment, Switching time, Circularly polarized field, Stochastic Landau-Lifshitz equation.
The magnetization switching effect of the uniaxial nanoparticle driven by a circularly polarized in the plane perpendicular to the easy axis field in the presence of thermal fluctuations is studied. The frequency dependence of the magnetic moment switching time from one equilibrium state to another is investigated in details, indicating its resonant character and fundamental dependence on the direction of rotation of the field. The effect of precession mode on switching time is discussed. A comparative analysis of the switching time with a lifetime for precession modes is done in this paper. We study the influence of the damping parameter and the amplitude of the external field on the switching time.

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