Raman spectra and room-temperature ferromagnetism of hydrogenated Zn 0.95Mn0.05O nanopowders

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作者：
Wang, Zhenhua [1 ]
Geng, Dianyu [1 ]
Hu, Weijin [1 ]
Zhang, Zhidong [1 ]
机构：
[1] Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
来源：
Journal of Applied Physics | 2009年 / 105卷 / 12期
关键词：
Two additional vibration modes at 250 and 529 cm-1 were observed in hydrogenated Zn0.98Mn0.05O nanopowders. The number of oxygen vacancies was increased by hydrogenation; which induced the mode at 250 cm-1. The additional vibration mode at 529 cm-1 was due to the increase of the number of subsititutional Mn atoms occupying Zn sites; which resulted that some new lattice defects were introduced or intrinsic host-lattice defects became activated/intensified. The room-temperature ferromagnetism was observed in the hydrogenated Zn0.98Mn0.05O nanopowders prepared at high temperature (T=700 °C); which originated from the lattice defects such as oxygen vacancies and Zn interstitials. © 2009 American Institute of Physics;
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Conference article (CA)
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