Evidence for surface states in pristine and Co-doped ZnO nanostructures: magnetization and nonlinear optical studies.

Abstract

An unexpected presence of ferromagnetic (FM) ordering in nanostructured ZnO has been reported previously. Recently, from our detailed magnetization studies and ab initio calculations, we attributed this FM ordering in nanostructured ZnO to the presence of surface states, and a direct correlation between the magnetic properties and crystallinity of ZnO was observed. In this study, through a systematic sample preparation of both pristine and Co-doped ZnO nanostructures, and detailed magnetization and nonlinear optical (NLO) measurements, we confirm that the observed FM ordering is due to the presence of surface states.

DOI: 10.1088/0957-4484/22/9/095703

Cite this paper

@article{Podila2011EvidenceFS, title={Evidence for surface states in pristine and Co-doped ZnO nanostructures: magnetization and nonlinear optical studies.}, author={Ramakrishna Podila and Benoy Anand and J Palmer West and Reji Philip and S. Siva Sankara Sai and Jian He and Malcolm J. Skove and S E Hwu and Sumanta Tewari and Apparao M. Rao}, journal={Nanotechnology}, year={2011}, volume={22 9}, pages={095703} }