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Defect induced paramagnetism in lightly doped ZnS:Fe nanoparticles

Defect induced paramagnetism in lightly doped ZnS:Fe nanoparticles

Authors :
G. Murali
B. Poornaprakash
D. Amaranatha Reddy
R.P. Vijayalakshmi
B.K. Reddy
Source :
Physica E: Low-dimensional Systems and Nanostructures. 73:63-68
Publication Year :
2015
Publisher :
Elsevier BV, 2015.

Abstract

Nanoparticles of ZnS:Fe (0, 1, 3, and 5 at%) were synthesized by a refluxing route at 80 °C. All the samples exhibited cubic structure as revealed by X-ray powder diffraction studies. Blue emission of undoped samples was totally quenched by Fe doping. Magnetic measurements showed that the undoped ZnS was diamagnetic whereas all the doped samples were paramagnetic at room temperature. EPR signal characteristic of Fe3+ was observed in all the doped samples at room temperature. The paramagnetism of the present samples is attributed to the presence of uncoupled Fe3+ ions mediated by cation vacancies.

Details

ISSN :
13869477
Volume :
73
Database :
OpenAIRE
Journal :
Physica E: Low-dimensional Systems and Nanostructures
Accession number :
edsair.doi...........fbcfa3017005d93a7ef0f6364fff10b1
Full Text :
https://doi.org/10.1016/j.physe.2015.05.017