Modulated magnetization depth profile in dipolarly coupled magnetic multilayers

S. Bedanta, E. Kentzinger, O. Petracic, W. Kleemann*, U. Rücker, Th Brückel, A. Paul, S. Cardoso, P. P. Freitas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Polarized neutron reflectivity (PNR) and magnetometry studies have been performed on the metal-insulator multilayer [Co80 Fe20 (1.6 nm) Al2 O3 (3 nm)] 9 which exhibits dominant dipolar coupling between the ferromagnetic layers. Our PNR measurements at the coercive field reveal a novel and unexpected magnetization state of the sample, exhibiting an oscillating magnetization depth profile from CoFe layer to CoFe layer with a period of five bilayers along the multilayer stack. With the help of micromagnetic simulations we demonstrate that competition between long- and short-ranged dipolar interactions apparently gives rise to this unprecedented phenomenon.

Original languageEnglish
Article number054426
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number5
DOIs
StatePublished - 2006
Externally publishedYes

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