An investigation of the interface and bulk contributions to the magneto-optic activity in Co/Pt multi-layered thin films

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Samenvatting

We report an experimental study which focuses on the magneto-optic interaction between light and perpendicularly
magnetized ferromagnetic thin-film multilayers. In this study, samples containing multiple Co/Pt interfaces are measured via the polar Magneto-Optic Kerr Effect (MOKE).Thanks to a sample set with a continuous Co thickness variation, and single and double Co layered samples, interface and bulk contributions to the magneto-optic activity are
separately determined. Kerr rotation and ellipticity signals are recorded as a function of the Co thickness. The results are analyzed via a transfer matrix method that accounts for the standard optical and magneto-optic effects in multilayered thin-films. Bulk magneto-optic contribution of Co (QCo;bulk) that is in accordance with literature is consistently determined despite the use of thin-films. Interfacial Co (QCo;int:) and magnetized Pt (QPt) contributions are presented in terms of two models. Interface phenomena of the large spin-orbit coupling between Co and Pt and the proximity induced magnetization in Pt layer are represented in the models. The strength of interfacial magneto-optic activity is interpreted as an indicator of the relative interface quality among the samples.
Originele taal-2Engels
Artikelnummer163904
Aantal pagina's9
TijdschriftJournal of Applied Physics
Volume129
DOI's
StatusGepubliceerd - 27 apr 2021

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