Doping induced magnetism in Co-ZnS nanoparticles
Journal
Journal of Solid State Chemistry
Journal Volume
182
Journal Issue
10
Pages
2598-2601
Date Issued
2009
Author(s)
Abstract
Zn1-xCoxS nanoparticles with x=0, 0.1, 0.2, and 0.3 were synthesized by the co-precipitation method using thiophenol as capping agent. The effect of Co doping on the structural, optical and magnetic properties are investigated. The X-ray diffraction patterns show single phase with cubic structure and the images of Transmission Electron Microscopy indicate an average particle size of 39 nm. Significant blue shift in the optical absorbing band edge was observed with increasing Co doping. In the Co doped samples, room-temperature (RT) magnetic hysteresis is observed and the magnetization reduces with increasing Co content. However, these samples show paramagnetic resonance instead of ferromagnetic resonance at both 300 and 80 K, suggesting that the origin of RT magnetization in these Zn1-xCoxS nanoparticles involves with the frustration of antiferromagnetic interactions. © 2009 Elsevier Inc. All rights reserved.
SDGs
Type
journal article