Forced nonlinear precession of the magnetization vector under the conditions of an orientation transition

Asymmetric excitation of the two-order magnetization precession under orientational transition conditions

“…x y h θ By analogy with [16], the Landau-Lifshitz equa tions the Gilbert dissipative term for magnetization motion are written as…”

“…It has been demonstrated that [16] expressions , (4) where F is the ac field frequency and h 0 is its ampli tude, define the system excitation by a circularly polarized ac field. As a result, the precession of equi librium position is possible; i.e., under definite condi tions, the equilibrium position, around which a mag netization vector rotates at an excitation frequency, begins to precess near the dc field direction.…”

“…When = 0 and ≥ , the magnetization vector lies, respectively, in the plate plane and perpendicular to plane thereof. In the field interval from 0 to the magnetization vector deviates from the Oz axis through angle determined from the formula [16] (…”

“…It is assumed that an indefinite isotropic ferrite plate with the magnetization oriented along the nor mal to its plane and the geometric configuration pro posed in [16] are used. Let Oxyz be the Cartesian coor dinate system and its Oz axis be perpendicular to the plane surface.…”

“…In [16], the forced large amplitude magnetization precession was analyzed when the dc magnetic field is less than the demagnetization one, i.e., the stationary magnetization vector misaligns with the field direc tion. In this case, the circularly polarized ac field induces the circular precession of the equilibrium position of a magnetization vector, which can be called second order precession thereof.…”