Abstract
Nanocrystalline powders of Zn1−xCoxO synthesized by the coprecipitation technique show anomalous anisotropic broadening forx>0.05.This peak broadening is shown to be not only due to a reduction in the particle size but also due toa significant strain contribution, as confirmed by Williamson–Hall analysis. The presence of groupedCo2+ ions, revealing the presence of clusters of high spinCo2+ with antiferromagnetically coupled spins, as indicated by magnetization studies, seems tobe responsible for the strain.
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