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Elsevier, Physica B: Condensed Matter, 1-2(397), p. 65-67

DOI: 10.1016/j.physb.2007.02.066

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Polarized neutron reflectivity studies on granular Co80Fe20/Al2O3 multilayers

Journal article published in 2007 by S. Bedanta, E. Kentzinger, Oleg Petracic, W. Kleemann, U. Rücker, U. Ruecker, A. Paul, Th Brueckel, T.-H. Brückel ORCID, Th Brücke, L. S. Cardoso, P. P. Freitas
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This paper is available in a repository.

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Abstract

Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co80Fe20(tn)/Al2O3(3nm)]m. For a non-percolating superferromagnetic sample (tn = 1.3 nm) no spin-flip 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.