Micromagnetic analysis of geometrically controlled current-driven magnetization switching

The magnetization dynamics induced by current pulses in a pair of two “S-shaped” ferromagnetic elements, each one consisting on two oppositely tilted tapered spikes at the ends of a straight section, is theoretically studied by means of micromagnetic simulations. Our results indicate that the magnet...

Full description

Saved in:
Bibliographic Details
Published in:AIP advances 2017-05, Vol.7 (5), p.055909-055909-6
Main Authors: Alejos, O., Raposo, V., Hernandez, M. A., Sanchez-Tejerina, L., Moretti, S., Martinez, E.
Format: Article
Language:English
Subjects:
Current pulses
Domain walls
Ferromagnetism
Magnetic switching
Magnetism
Magnetization reversal
Nucleation
Polarity
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The magnetization dynamics induced by current pulses in a pair of two “S-shaped” ferromagnetic elements, each one consisting on two oppositely tilted tapered spikes at the ends of a straight section, is theoretically studied by means of micromagnetic simulations. Our results indicate that the magnetization reversal is triggered by thermal activation, which assists the current-induced domain nucleation and the propagation of domain walls. The detailed analysis of the magnetization dynamics reveals that the magnetization switching is only achieved when a single domain wall is nucleated in the correct corner of the element. In agreement with recent experimental studies, the switching is purely dictated by the shape, being independent of the current polarity. The statistical study points out that successful switching is only achieved within a narrow range of the current pulse amplitudes.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4973749