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Magnetic anisotropy of semiconductor (Ge,Mn)Te microstructures produced by laser and electron beam induced crystallization
Author(s) -
Knoff Wojciech,
Świątek Krzysztof,
Andrearczyk Tomasz,
Domukhovski Viktor,
Dziawa Piotr,
Kowalczyk Leszek,
Łusakowska Elżbieta,
Šiušys Aloyzas,
Taliashvili Badri,
Wróbel Jerzy,
Story Tomasz
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201001198
Subject(s) - materials science , condensed matter physics , ferromagnetic resonance , microstructure , ferromagnetism , amorphous solid , paramagnetism , crystallization , squid , demagnetizing field , magnetic anisotropy , magnetization , magnetic field , crystallography , chemistry , metallurgy , physics , ecology , organic chemistry , quantum mechanics , biology
Ferromagnetic transition and magnetic anisotropy was studied by SQUID magnetometry and ferromagnetic resonance (FMR) methods in polycrystalline Ge 1‐ x Mn x Te ( x = 0.085) semiconductor microstructures embedded in an amorphous, insulating, and paramagnetic (Ge,Mn)Te matrix. The microstructures were produced by pulsed laser and electron beam induced local re‐crystallization of amorphous layers deposited on insulating BaF 2 substrates. The angular dependence of the FMR resonance field observed below the Curie temperature T C = 70 K of the microstructures is quantitatively described by the analysis of Zeeman and demagnetization contributions to magnetic free energy. Good agreement with experimental results obtained in the case of structures produced by pulsed laser re‐crystallization indicates the formation of ferromagnetic (Ge,Mn)Te thin disks of submicron dimensions.