Options
Shruti Dubey
Loading...
Preferred name
Shruti Dubey
Official Name
Shruti Dubey
Alternative Name
Dubey, Shruti
Main Affiliation
Email
ORCID
Scopus Author ID
Google Scholar ID
5 results
Now showing 1 - 5 of 5
- PublicationCurved domain walls in the ferromagnetic nanostructures with Rashba and nonlinear dissipative effects(01-05-2022)
;Shahu, Chiranjeev K. ;Dwivedi, SharadThis work reveals an analytical investigation of the curved domain wall motion in ferromagnetic nanostructures in the framework of the extended Landau-Lifshitz-Gilbert equation. To be precise, the study delineates the description of curved domain wall motion in the steady-state dynamic regime for metallic and semiconductor ferromagnets. The study is done under the simultaneous action of the Rashba field and nonlinear dissipative effects described via the viscous-dry friction mechanism. By means of reductive perturbation technique and realistic assumption on the considered parameters, we establish an analytical expression of the steady domain wall velocity that depends on mean curvature of domain wall surfaces, nonlinear dissipation coefficients, Rashba parameter, external magnetic field, and spin-polarized electric current. In particular, it is observed that the domain wall velocity, mobility, threshold, and Walker breakdown can be manipulated by the combined mechanism of the Rashba field and nonlinear dissipation coefficients. Finally, the obtained analytical results are illustrated numerically for the curved domain walls through constant-curvature surfaces under-considered scenarios. The results presented herein are in qualitatively good agreement with the recent observations. - PublicationOn the Evolution of Transverse Domain Walls in Biaxial Magnetic Nanowires(01-01-2017)
;Dwivedi, SharadIn this article, we analyze the dynamics of transverse domain walls in the framework of one-dimensional biaxial magnetic nanowires induced by the small applied magnetic fields. The evolution of magnetization in the nanowire is governed by the modified version of Landau-Lifshitz-Gilbert equation which consists of nonlinear dissipations namely dry-friction and viscous. We investigate the features of traveling wave solutions using the perturbation expansion technique. More precisely, we derive an expression for the zero order traveling wave solutions under the action of small and mild transverse magnetic fields. - PublicationOn Dynamics of Current-Induced Static Wall Profiles in Ferromagnetic Nanowires Governed by the Rashba Field(01-03-2017)
;Dwivedi, SharadThis article deals with the analytical study of propagation of static wall profiles in ferromagnetic nanowires under the effect of spin–orbit Rashba field. We consider the governing dynamics for the evolution of magnetization inside the ferromagnetic material as an extended version of Landau–Lifshitz–Gilbert–Slonczewski equation of micromagnetism. It comprises the nonlinear dissipation factors like dry-friction and viscous. We establish the threshold and Walker-type breakdown estimates of the external sources in the steady-regime and also illustrate the obtained results numerically. - PublicationField-driven Motion of Ferrofluids in Ferromagnetic Nanowire under the Influence of Inertial Effects(01-01-2015)
;Dwivedi, SharadIn this article, we investigate the field-driven motion of magnetic fluids (ferrofluids) in ferromagnetic nanowire under the influence of its own inertia. We establish the results in the framework of modified Landau-Lifschitz-Gilbert equation of micromagnetism which comprise the nonlinear dissipation factors like dry-friction and viscous. We delineate the motion in both the dynamical regimes namely the steady-state and the precessional. In the end, the physical significance of the obtained results is discussed with an aid of numerical analysis. - PublicationDynamics of curved domain walls in hard ferromagnets with nonlinear dissipative and inertial effects(01-06-2023)
;Shahu, Chiranjeev K. ;Dwivedi, SharadThis article investigates the field-driven motion of curved domain walls in ferromagnetic nanostructures under the framework of modified Landau–Lifshitz–Gilbert equation with inertial effects. The considered governing equation involves the torques arising from nonlinear dissipative (viscous and dry friction) and inertial effects. We study the most relevant dynamical features in the steady dynamical regime for the considered model by employing the reductive perturbation technique. Finally, we illustrate the results numerically for the various domain wall surfaces (plane, cylinder, and sphere) and discuss their physical significance. The results obtained here agree with the recent theoretical and experimental observations.