Abstract
Zn 1− x Mn x O crystallites were synthesized by hydrothermal method. X-ray diffraction, UV–Vis absorption spectroscopy, and electron paramagnetic resonance (EPR) spectra confirm the substitution of Zn site by Mn 2+ ion. The nonmonotonic variation of band gap exhibits that the short-ranged interactions between the d electrons of Mn and the s and p electrons of the host bands are dominated at lower Mn concentration ( x). EPR spectra show that Mn 2+ is in exchange interaction at higher x. By using a Curie–Weiss equation on the EPR data, it is found that the dominant magnetic property is antiferromagnetic for higher x, and paramagnetic for lower x.
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