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Effects of Cu-Doping on the Magnetic State of Zn0.9−x Fe0.1Cu x O

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Magnetization measurements were performed on a series of Zn0.9−x Fe0.1Cu x O samples (0 < x ∼ 0.1) prepared using solid state reaction and sol–gel methods. Although Cu is nonmagnetic, we found that increasing Cu content increases the saturation magnetization and enhances the hysteresis losses. Curie behavior of the susceptibility at high temperature indicates the presence of ferromagnetic exchange interaction. Moreover, we found that the exchange interaction and the molecular field coefficient are both ferromagnetic and greatly enhanced with Cu-doping; however, the Arrott-Belov-Kouvel plot did not reveal the presence of spontaneous magnetization down to 4.2 K.
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Keywords: CURIE BEHAVIOR; EXCHANGE INTERACTION; FERROMAGNETIC; HYSTERESIS LOOP; MAGNETIC SEMICONDUCTORS

Document Type: Research Article

Publication date: 2011-03-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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