Defect induced magnetism in green synthesized Cadmium Sulfide nanoparticles for spintronics applications

摘要

Introducing room - temperature ferromagnetism, in wide bandgap semiconductors has gained significant interest in the field of diluted magnetic semiconductors. Here, the Cadmium Sulfide and CdS - C. odorata leaf extract composites, fabricated through green synthesis routes, show room - temperature ferromagnetism and improved electrical conductivity. Here, the origin of magnetism is attributed to the trapped electrons in the F - center, which is emanated from the sulfur vacancies. Besides, the composite has ligand - induced magnetism due to the electron transfer at the interface between the CdS and the leaf extract. Enhanced conductivity observed in the composite nanoparticle is due to the loss of a few electrons from the F - center to the conduction band. The leaf extract modified CdS samples exhibit unconventional ferromagnetism which makes them ideal for spintronics applications without any magnetic impurity doping. The improved electrical conductivity exhibited by the samples forecast their multi - utility potential to be exploited for electrical and photovoltaic applications in addition to their DMS and spintronic applications.