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Tailoring Fe/Ag superparamagnetic composites by multilayer deposition

J. Balogh, D. Kaptás, L. F. Kiss, and T. Pusztai

Research Institute for Solid State Physics and Optics, H-1525 Budapest, P. O. Box 49, Hungary

E. Szilágyi and Á. Tunyogi

KFKI Research Institute for Particle and Nuclear Physics, H-1525 Budapest, P. O. Box 49, Hungary

J. Swerts, S. Vandezande, K. Temst, and C. Van Haesendonck

Laboratorium voor Vaste-Stoffysica en Magnetisme, K. U. Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

(Received 23 February 2005; accepted 8 July 2005; published online 29 August 2005)

Fe/Ag granular multilayers were examined by magnetization and Mössbauer spectroscopy measurements. Very-thin (0.2 nm) discontinuous Fe layers show superparamagnetic properties that can be tailored by the thickness of both the magnetic and the spacer layers. Novel heterostructures, superparamagnetic and ferromagnetic layers stacked in different sequences, were prepared and the specific contribution of the ferromagnetic layers to the low-field magnetic susceptibility was identified. ©2005 American Institute of Physics

doi:10.1063/1.2035886
PACS: 75.50.Tt, 75.20.En, 75.70.Cn, 75.60.Ej, 75.30.Cr, 75.50.Bb, 76.80.+y        Additional Information

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