Magnetization dynamics of perpendicular exchange-biased (Pt/Co)-Pt-IrMn multilayers studied by MOKE microscopy and magnetometry

M. Czapkiewicz*, S. van Dijken, T. Stobiecki, R. Rak, M. Zoladz, P. Mietniowski

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

10 Citations (Scopus)

Abstract

In this paper the dynamics of the magnetization reversal process in perpendicularly biased [20 Å Pt/5 Å Co]3 Å Pt/100 Å IrMn/20 Å Pt multilayers with different Pt insertion layer thickness (0 Å ≤ t ≤ 12 Å) is studied. The insertion of 1 Å thick Pt enhances the exchange bias field (Hex) and for t > 3 Å Hex decreases exponentially with increasing Pt layer thickness. We show by magnetization relaxation measurements and direct observation of magnetic domains that magnetization reversal takes place by the nucleation of isolated cylindrical domains with a different nucleation site density in the forward and backward branches of the hysteresis loop. All the results were quantitatively analyzed using the Fatuzzo model for the dynamics of domain reversal processes. The activation energies for magnetization reversal by domain nucleation and domain propagation were determined.

Original languageEnglish
Title of host publicationPHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS
PublisherWILEY-VCH VERLAG
Pages48-52
Number of pages5
DOIs
Publication statusPublished - Jan 2006
MoE publication typeA4 Article in a conference publication
EventEuropean Conference on Physics of Magnetism - Poznan, Poland
Duration: 24 Jun 200527 Jun 2005

Publication series

Name Physica Status Solidi C-Current Topics in Solid State Physics
Number1
Volume3
ISSN (Print)1862-6351

Conference

ConferenceEuropean Conference on Physics of Magnetism
Abbreviated titlePM
CountryPoland
CityPoznan
Period24/06/200527/06/2005

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