Synthesis and ferromagnetism of Mn-doped ZnO diluted magnetic semiconductors

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作者：
Key Laboratory of Low Dimensional Materials and Application Technology, Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China [1 ]
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来源：
Guangdianzi Jiguang | 2007年 / 5卷 / 597-599期
关键词：
Crystal structure - Curie temperature - Ferromagnetism - Hysteresis loops - Lattice constants - Magnetic properties - Morphology - Nanoparticles - Quantum interference devices - Sol-gel process - Synthesis (chemical) - Transmission electron microscopy - X ray diffraction analysis - Zinc oxide;
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摘要：
Mn-doped ZnO (Zn1-xMnxO, x&le0.05) diluted magnetic semiconductor (DMS) nanoparticles are prepared with sol-gel process assisted by ultrasonic. The morphology, crystal structure, and magnetic properties are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) spectrometer and superconducting quantum interference device (SQUID), respectively. Mn-doped ZnO samples can keep good wurtzite structures at lower doping contents. The lattice parameters increase almost linearly as the doping concentration x increasing, and no impurities are identified. A good hysteresis loop indicates fine ferromagnetism with a Curie temperature which is higher than 350 K in Zn0.98Mn0.02O.
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