Bhardwaj, Richa Chae, Keun Hwa Goyal, Navdeep 2024-01-19T17:01:47Z 2024-01-19T17:01:47Z 2021-09-05 2020-08 0042-207X https://pubs.kist.re.kr/handle/201004/118298 In this paper, Zn1-xCoxO (x = 0, 0.005, 0.01, 0.02, 0.03, and 0.05) nanostructure exhibiting room temperature ferromagnetic (RTFM) properties were synthesized via chemical solution route. Rietveld refined X-ray diffraction measurements revealed the successful incorporation of Co ions in ZnO matrix without changing the hexagonal wurtzite structure of ZnO nanocrystals and with average crystallite size in the range 35-43 nm. Photoluminescence (PL) measurements revealed the defect related red-shifted broad visible emission peak in the region 500-750 nm on doping that play a key role in ferromagnetism. Systematic magnetic and electronic structure measurements revealed that the nature of the defects and incorporated Co2+ ions plays a significant role in attaining the ferromagnetic ordering. Near-edge X-ray absorption fine-structure (NEXAFS) and Extended edge X-ray absorption fine-structure (EXAFS) data were measured at OK-, Co and Zn K- and L-3,L-2-edges to understand the nature of defects and interactions giving rise to RTFM. These findings will be helpful in better understanding and realizing the RTFM in Co:ZnO system for spintronics and optoelectronic applications. English PERGAMON-ELSEVIER SCIENCE LTD THIN-FILMS OPTICAL-PROPERTIES NANORODS Electronic structural study of defect-induced magnetism in Co doped ZnO nanostructure Article 10.1016/j.vacuum.2020.109446 1 VACUUM, v.178 VACUUM 178 scie scopus 000541439800019 2-s2.0-85085256382 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article THIN-FILMS OPTICAL-PROPERTIES NANORODS ZnO nanostructure Magnetism NEXAFS EXAFS Oxygen vacancy