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

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

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.
Original languageEnglish
Article number163904
Number of pages9
JournalJournal of Applied Physics
Volume129
Issue number16
DOIs
Publication statusPublished - 27 Apr 2021

Keywords

  • Co/Pt multilayers
  • Interface characterization
  • proximity induced magnetization
  • MOKE
  • thin-film
  • Magnetron sputtering
  • magneto-optic efficiency

Fingerprint Dive into the research topics of 'An investigation of the interface and bulk contributions to the magneto-optic activity in Co/Pt multi-layered thin films'. Together they form a unique fingerprint.

Cite this