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Shruti Dubey
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Shruti Dubey
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Shruti Dubey
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Dubey, Shruti
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5 results
Now showing 1 - 5 of 5
- PublicationOn the Statics of Transverse Domain Walls in Ferromagnetic Nanostrips(01-06-2020)
;Dwivedi, Sharad; Singh, Yenshembam PriyobartaIn this article, we investigate the static properties of the transverse domain wall in ferromagnetic nanostrip under the influence of a uniform transverse magnetic field. We perform the analysis under the framework of the Landau–Lifshitz–Gilbert equation, which describes the evolution of magnetization inside the ferromagnetic medium. More precisely, first, we establish the magnetization profile in the two faraway domains and then examine the static magnetization profile in the sole presence of the applied transverse magnetic field, both analytically and numerically. The obtained analytical results are in qualitatively good agreement with recent numerical simulations and experimental observations. - PublicationField-driven magnetization reversal in a three-dimensional network of ferromagnetic ellipsoidal samples(01-08-2020)
;Dwivedi, SharadThe field-driven magnetization reversal in a three-dimensional network of ferromagnetic particles of ellipsoidal shape is analytically studied with an emphasis on coupling among the particles. The considered governing dynamics is the Landau–Lifshitz equation of micromagnetism which delineates the motion of magnetization inside the ferromagnetic medium. The analytical results explicate the stability and controllability (reversal) of the relevant configurations of magnetization which are established under the sufficient conditions. To reverse the magnetization direction in the particles, we use the control as a magnetic field generated by a dipole whose position and strength can be chosen. - PublicationOn Controllability of a Two-Dimensional Network of Ferromagnetic Ellipsoidal Samples(15-01-2019)
; Dwivedi, SharadIn this article, we address the problem of stability and controllability of two-dimensional network of ferromagnetic particles of ellipsoidal shapes. The dynamics of magnetization inside the ferromagnetic material is governed by the Landau–Lifschitz equation of micromagnetism which is non-linear and parabolic in nature. The control is the magnetic field generated by a dipole whose position and amplitude can be selected. In the absence of control, first we prove the exponential stability of the relevant configurations of the network. Then, we investigate the controllability by the means of external magnetic field induced by the magnetic dipole. - PublicationOn the stability of static domain wall profiles in ferromagnetic thin film(01-01-2019)
;Dwivedi, SharadIn this article, we consider a two-dimensional model of ferromagnetic material. Our prime goal is to analyze the stability of static domain wall configuration calculated by Walker. The dynamics of magnetization inside the material is governed by the Landau–Lifschitz equation which is nonlinear and parabolic in nature. We prove the stability of the static waves solutions for the Landau–Lifschitz equation with a simplified expression of the stray field which is not unique in general, because of the non-convexity constraint |u| = 1. - PublicationOn stability of steady-statesfor a two-dimensional network model of ferromagnetic nanowires(01-01-2015)
;Dwivedi, SharadThis article concerns with the mathematical study of stability properties of steady-states for a two-dimensional network model of ferromagnetic nanowires. We consider the finite network model of ferromagnetic nanowires of semi-infinite length. We derive a sufficient condition independent of the size of the network under which the relevant configurations (steady-states) of magnetization are shown to be asymptotically stable. To be precise, we establish the result under certain condition on the length between the two consecutive nanowires. We use perturbation technique and energy method to derive the result.