Magnetization switching in single-domain particles and a response to a field pulse |
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Authors: | L N Kotov L S Nosov |
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Institution: | (1) Syktyvkar State University, Syktyvkar, 167001 Komi Republic, Russia |
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Abstract: | An equation in the Gilbert form that describes the motion of the magnetization vector in intense high-frequency magnetic fields
is solved numerically. The solution obtained is used to study switching of the magnetization of a single-domain ferromagnetic
particle that has the shape of an ellipsoid of revolution and possesses cubic anisotropy from the position parallel to an
easy axis to the position normal to this axis. The ranges of amplitudes and frequencies of the magnetic field where magnetization
switching is observed are determined. An expression for the response of an ensemble of variously oriented particles is derived.
It is shown that a particle ensemble generated by an rf field may serve as a data carrier on which information is written
and read out by means of nonlinear and linear ferromagnetic resonances. |
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Keywords: | |
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