Anisotropic magnetoresistance state space of permalloy nanowires with domain wall pinning geometry.

Abstract:

:The domain wall-related change in the anisotropic magnetoresistance in L-shaped permalloy nanowires is measured as a function of the magnitude and orientation of the applied magnetic field. The magnetoresistance curves, compiled into so-called domain wall magnetoresistance state space maps, are used to identify highly reproducible transitions between domain states. Magnetic force microscopy and micromagnetic modelling are correlated with the transport measurements of the devices in order to identify different magnetization states. Analysis allows to determine the optimal working parameters for specific devices, such as the minimal field required to switch magnetization or the most appropriate angle for maximal separation of the pinning/depinning fields. Moreover, the complete state space maps can be used to predict evolution of nanodevices in magnetic field without a need of additional electrical measurements and for repayable initialization of magnetic sensors into a well-specified state.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Corte-León H,Nabaei V,Manzin A,Fletcher J,Krzysteczko P,Schumacher HW,Kazakova O

doi

10.1038/srep06045

subject

Has Abstract

pub_date

2014-08-13 00:00:00

pages

6045

issn

2045-2322

pii

srep06045

journal_volume

4

pub_type

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