Superparamagnetic Grains as Source of Giant Magnetoresistance Effect in Discontinuous Co/Ag Multilayers |
| T. Luciński, F. Stobiecki, J. Dubowik Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland and R. Czajka Institute of Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznań, Poland |
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| The as-deposited and annealed Co/Ag discontinuous multilayer-like structures were examined. Discontinuous Co sublayers are thought to consist of fine superparamagnetic and ferromagnetic grains. Using the bimodal superparamagnetic grain sizes distribution the GMR(H) dependencies were successfully modelled with the use of two Langevin functions simulating the magnetization of the superparamagnetic grains. |
| DOI: 10.12693/APhysPolA.91.269 PACS numbers: 75.70.Cn |