Micromagnetic simulation of energy consumption and excited eigenmodes in elliptical nanomagnetic switches

TitleMicromagnetic simulation of energy consumption and excited eigenmodes in elliptical nanomagnetic switches
Publication TypeJournal Article
Year of Publication2014
AuthorsCarlotti G., Madami M., Gubbiotti G., Tacchi S.
JournalPhysica B: Condensed Matter
Volume435
Pagination4 - 7
ISSN0921-4526
KeywordsSpin waves
Abstract

Abstract Sub-200 nm patterned magnetic dots are key elements for the design of magnetic switches, memory cells or elementary units of nanomagnetic logic circuits. In this paper, we analyse by micromagnetic simulations the magnetization reversal, the dissipated energy and the excited spin eigenmodes in bistable magnetic switches, consisting of elliptical nanodots with 100×60 nm lateral dimensions. Two different strategies for reversal are considered and the relative results compared: (i) the irreversible switching obtained by the application of an external field along the easy axis, in the direction opposite to the initial magnetization; (ii) the precessional switching accomplished by the application of a short magnetic field pulse, oriented perpendicular to the initial magnetization direction. The obtained results are discussed in terms of deviation from the macrospin behavior, energy dissipation and characteristics of the spectrum of spin eigenmodes excited during the magnetization reversal process.

URLhttp://www.sciencedirect.com/science/article/pii/S0921452613006406
DOI10.1016/j.physb.2013.10.022
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