Raman spectra and room-temperature ferromagnetism of hydrogenated Zn0.95Mn0.05O nanopowders

被引：8
|
作者：
Wang, Zhenhua [1 ]
Geng, Dianyu
Hu, Weijin
Zhang, Zhidong
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 12期
关键词：
MN-DOPED ZNO; MAGNETIC SEMICONDUCTORS; THIN-FILMS; SCATTERING; BULK;
D O I：
10.1063/1.3147867
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 degrees C), which originated from the lattice defects such as oxygen vacancies and Zn interstitials. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3147867]
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页数：4
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