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Magnetic properties of nanocrystalline ZnO doped with MnO and CoO

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, , Citation I Kuryliszyn-Kudelska et al 2010 J. Phys.: Conf. Ser. 200 072058 DOI 10.1088/1742-6596/200/7/072058

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1 Institute of Physics, Polish Academy of Sciences, Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland

2 Institute of Physics, Belgrade University, Pregrevica 118, 11080 Belgrade, Serbia

3 Szczecin University of Technology, Institute of Chemical and Environment Engineering, Pulaskiego 10, 70-322 Szczecin, Poland

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1742-6596/200/7/072058

Abstract

We have studied the magnetic properties of ZnO nanocrystals doped with MnO and CoO in the wide range of magnetic dopant (from 5 to 95 wt. %), synthetized by wet chemical method. The samples were characterized by means of XRD and micro-Raman spectroscopy. The results of systematic measurements of magnetic susceptibility as a function of temperature and frequency as well as SQUID magnetization are presented. We observed different types of magnetic behavior. ZnO nanocrystals doped with CoO demonstrate Curie-Weiss behavior at higher temperatures. For samples doped with MnO, we observed the superparamagnetism above the blocking temperature.

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10.1088/1742-6596/200/7/072058