Numerical Study for Successive Ballistic Motion of Magnetization in Single Domain Particle Caused by Alternating Magnetic Fields

This paper confirms numerically the maximum rotating angle of magnetization thetas_max can be enhanced by applying sinusoidal hard-axis field with a frequency much faster than a typical relaxation time (< 1 ns). In this case, the magnetic field exerted on the magnetization is temporally varying before a damping effect is appeared, so that the successive ballistic motion of magnetization is expected.