Article ID Journal Published Year Pages File Type
5365695 Applied Surface Science 2010 5 Pages PDF
Abstract

Co-doped SnO2 films codoped with nitrogen (N) have been prepared by magnetron sputtering to investigate the effect of p-type defects on magnetic properties. The incorporation of N modifies the preferential growth orientation of the films. Multiple characterization techniques reveal that the incorporated Co2+ and N3− ions substitute for Sn4+ and O2− sites in SnO2 lattice, respectively. As N concentration increases, the band gap of the films decreases because of the formation of Sn-N bond. Room-temperature ferromagnetism is observed in (Co, N)-codoped SnO2 films, and the saturated magnetic moment is sensitive to the incorporated N concentration. The variations in the magnetic properties as a function of N concentration are discussed on the basis of bound magnetic polaron model.

Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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