Abstract
CdS nanoparticles codoped with cobalt and manganese are synthesized by the surfactant assisted simple chemical coprecipitation method. Single cubic structure without any secondary phase formation is revealed by the XRD data. Small particle size around 4–5nm is estimated from the TEM images. EPR hyperfine splitting constant A around 95G associated with the presence of Mn ions on the surface of the nanocrystals is observed for all the samples. Variation of ferromagnetic order with Mn content studied by a vibration sample magnetometer is ascribed to the antiferromagnetic (AFM) interactions between the magnetic ions as explained by the bound magnetic polaron (BMP) theory. Surface defect related green emission is observed through photoluminescence (PL) studies. Absence of Mn characteristic emission further confirms the local structure of Mn ions evidenced by EPR results.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
