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Current induced magnetization switching in Co/Cu/Ni-Fe nanopillar with orange peel coupling
Author(s) -
D. Aravinthan,
P. Sabareesan,
M. Daniel
Publication year - 2015
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4927546
Subject(s) - nanopillar , magnetization , materials science , coupling (piping) , condensed matter physics , ferromagnetism , current density , current (fluid) , orange (colour) , magnetization dynamics , nanotechnology , physics , thermodynamics , magnetic field , composite material , optics , nanostructure , quantum mechanics
The impact of orange peel coupling on spin current induced magnetization switching in a Co/Cu/Ni-Fe nanopillar device is investigated by solving the switching dynamics of magnetization of the free layer governed by the Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation. The value of the critical current required to initiate the magnetization switching is calculated analytically by solving the LLGS equation and verified the same through numerical analysis. Results of numerical simulation of the LLGS equation using Runge-Kutta fourth order procedure shows that the presence of orange peel coupling between the spacer and the ferromagnetic layers reduces the switching time of the nanopillar device from 67 ps to 48 ps for an applied current density of 4 × 1012Am−2. Also, the presence of orange peel coupling reduces the critical current required to initiate switching, and in this case, from 1.65 × 1012Am−2 to 1.39 × 1012Am−2

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