Electron paramagnetic resonance spectra of PbMnI(2) bulk crystals and nanocrystals

We report a study of the Pb(1-x)Mn(x)I(2) bulk crystals and nanocrystals using electron paramagnetic resonance (EPR). The samples of the bulk Pb(1-x)Mn(x)I(2) crystals with x in the range from 0 to 0.05 have been grown by Bridgman technique. The composite nanostructures containing the diluted magnet...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2013-01, Vol.345, p.134-137
Main Authors: Savchuk, A I, Stolyarchuk, I D, Stefaniuk, I, Rogalska, I, Sheregii, E, Makoviy, V V, Shporta, O A
Format: Article
Language:English
Subjects:
Bridgman method
Crystals
Electron paramagnetic resonance
Nanocrystals
Nanostructure
Spectra
Spectral lines
Temperature dependence
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Summary:We report a study of the Pb(1-x)Mn(x)I(2) bulk crystals and nanocrystals using electron paramagnetic resonance (EPR). The samples of the bulk Pb(1-x)Mn(x)I(2) crystals with x in the range from 0 to 0.05 have been grown by Bridgman technique. The composite nanostructures containing the diluted magnetic semiconductor nanocrystals of Pb(1-x)Mn(x)I(2) with x in the range from 0 to 0.15 have been prepared by embedding them into gelatin and polyvinylalcohol matrices using colloidal technology. The EPR spectra consist of an intense broad line and several weak narrow lines which correspond to hyperfine spectra of Mn(2+) ions. The temperature dependence of EPR spectra suggests of strong spin exchange interactions due to presence of magnetic ions in the bulk crystals and nanoparticles. The good agreement temperature dependence of integral intensity of Mn(2+) ions for bulk crystals and nanocrystals with the Curie-Weiss law was obtained.
ISSN:0304-8853