arXiv subjects

V. Veerakumar

Publications and source records attributed to V. Veerakumar.

2 recordsLinked to original sources

arXiv2001

Magnetization Reversal in Ferromagnetic Film Through Solitons by Electromagnetic Field

We study the reversal of magnetization in an isotropic ferromagnetic film free from charges by exposing it to a circularly polarized electromagnetic (EM) field. The magnetization excitations obtained in the form of line and lump solitons of the completely integrable modified KP-II equation which is derived using a reductive perturbation method from the set of coupled Landau-Lifshitz and Maxwell equations. It is observed that when the polarization of the EM-field is reversed followed by a rotation, for every $ {π\over 2} $-degrees, the magnetization is reversed.

nlin.SI↗

arXiv2001

On a new approach to optical solitons in dielectric fibers

In this letter we describe a new and simple approach for modulating the electromagnetic wave propagating in a dielectric medium in the form of solitons by considering the torque developed between the induced dipoles in the medium and external field without taking into account the nonlinear Kerr effect. A reductive perturbation method deduces the Maxwell equation coupled with the Larmor equation of the torque to the derivative nonlinear Schrödinger equation that admits optical solitons in the medium.

nlin.SI↗