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Magneto‐optical properties in hybrid nanostructures of II–VI diluted magnetic semiconductors with perpendicular ferromagnetic films
Author(s) -
Sakuma M.,
Hyomi K.,
Souma I.,
Murayama A.,
Oka Y.
Publication year - 2006
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.200564692
Subject(s) - zeeman effect , condensed matter physics , ferromagnetism , materials science , magnetic field , magnetization , exciton , photoluminescence , quantum well , thin film , magnetic semiconductor , optoelectronics , nanotechnology , optics , physics , laser , quantum mechanics
Hybrid nanostructures of a diluted magnetic semiconductor quantum well (DMS‐QW) of Zn 1– x – y Cd x Mn y Se have been fabricated with a ferromagnetic Co/Pt‐multilayered film, by electron beam lithography. The disk structure of the DMS‐QW with the diameter of 100 nm was embedded in the magnetic thin film with the thickness of 50 nm. Giant Zeeman effects of excitons in the DMS‐QW in the hybrid structure are studied by micro‐photoluminescence (PL) spectroscopy. The Co/Pt film shows perpendicular magnetization without external field, and therefore it can generate magnetic fields nearly perpendicular to the DMS‐QW plane in the hybrid structure. As the result, the circularly polarized excitonic PL arises in zero external field, indicating that the perpendicular magnetic field applied from the Co/Pt film aligns the exciton spins in the DMS‐disk in the present hybrid structure. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)