FARADAY-EFFECT IN CDMNTE NANOCRYSTALS GROWN BY THE LASER DEPOSITION METHOD

Citation
Pi. Nikitin et al., FARADAY-EFFECT IN CDMNTE NANOCRYSTALS GROWN BY THE LASER DEPOSITION METHOD, Quantum electronics, 28(7), 1998, pp. 561-563
Citations number
11
Categorie Soggetti
Physics, Applied","Engineering, Eletrical & Electronic
Journal title
ISSN journal
10637818
Volume
28
Issue
7
Year of publication
1998
Pages
561 - 563
Database
ISI
SICI code
1063-7818(1998)28:7<561:FICNGB>2.0.ZU;2-0
Abstract
The method of laser deposition from a composite target was used to pre pare Cd1-xMnxTe nanocrystals embedded in an SiO2 dielectric matrix, A study of the Faraday effect in nanocrystals of this semimagnetic semic onductor revealed enhancement of this effect, compared with bulk cryst als. This was attributed to an increase in the oscillator strengths of exciton transitions and to the difference between these strengths in an external magnetic field. At helium temperatures the magnetic field dependence of the Faraday rotation in the nanocrystals was linear in f ields up to 200 kOe and the temperature dependence of the rotation in the range 4.2 - 30 K had a singularity associated with a transition of the nanoparticles from the paramagnetic state to a spin glass. The te mperature of this transition in the investigated nanocrystals was high er than the 'cooling' point of bulk semimagnetic semiconductors.