Interlayer Exchange Coupling in Short Period GaMnAs/GaAs Superlattices

• Authors: W. Szuszkiewicz , E. Dynowska , B. Hennion , F. Ott , M. Jouanne , J. Morhange , M. Karlsteen , J. Sadowski
• Languages of publication: EN

Abstracts

EN

The low dimensional structures containing III-V ferromagnetic semiconductors were intensively investigated in the last few years because of the variety of their potential applications. The aim of the present work was to study the interlayer exchange coupling in the short period GaMnAs/GaAs superlattices containing 16 or 8 GaMnAs monolayers. Samples with the magnetic layers corresponding to the mixed crystal composition with 5% or 6% of Mn were grown by MBE technique and characterized by both high-resolution X-ray diffraction and Raman scattering methods. Folded acoustic phonons were observed for the first time for this particular quantum system in the Raman scattering spectra. The interlayer exchange coupling in selected superlattices was investigated by both elastic neutron scattering (diffraction) and polarized neutron reflectivity measurements. Presence of the smooth interfaces and the stability of the superlattice period were confirmed by neutron reflectometry data. Ferromagnetic correlation of the magnetization vector in subsequent GaMnAs magnetic layers was demonstrated by both experimental methods.

Keywords

EN

61.12.-q; 75.25.+z; 78.30.Fs

Discipline

• 78.30.Fs: III-V and II-VI semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: 3
• Pages: 335-341

Dates

published

2001-09

received

2001-06-01

Contributors

author

W. Szuszkiewicz

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland

author

E. Dynowska

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland

author

B. Hennion

• Laboratoire Leon Brillouin, CE Saclay, 91191 Gif-sur-Yvette cedex, France

author

F. Ott

• Laboratoire Leon Brillouin, CE Saclay, 91191 Gif-sur-Yvette cedex, France

author

M. Jouanne

• Laboratoire des Milieux Désordonnés et Hétérogènes, UPMC, 4, pl. Jussieu, 75252 Paris, France

author

J. Morhange

• Laboratoire des Milieux Désordonnés et Hétérogènes, UPMC, 4, pl. Jussieu, 75252 Paris, France

author

M. Karlsteen

• Department of Experimental Physics, Chalmers University of Technology, Göteborg, Sweden

author

J. Sadowski

• Department of Experimental Physics, Chalmers University of Technology, Göteborg, Sweden

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Identifiers

DOI

10.12693/APhysPolA.100.335