Polarized neutron reflectivity studies on granular Co80Fe20/Al2O3 multilayers

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co80Fe20(tn)/Al2O3 (3 nm)]m. For a non-percolating superferromagnetic (SFM) sample (tn=1.3 nm) no spin-flip (SF) scattering was observed, measured at various points of the hysteresis, confirming that the magnetization reversal is achieved merely by domain nucleation and growth. For a percolated sample (tn=1.6 nm) an oscillating magnetization depth profile from FeCo layer to FeCo layer along the multilayer stack was observed around the coercive field. The competition between long-range dipolar, short-range Néel and external field interactions apparently give rise to such a modulated magnetization depth profile in these magnetic multilayers.

Original languageEnglish
Pages (from-to)65-67
Number of pages3
JournalPhysica B: Condensed Matter
Volume397
Issue number1-2
DOIs
StatePublished - 15 Jul 2007
Externally publishedYes

Keywords

  • Dipolar coupling
  • Magnetic thin films
  • Magnetization reversal mechanisms
  • Polarized neutron reflectometry

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