Defect studies in annealed ZnO by positron annihilation spectroscopy

被引：31
|
作者：
Sanyal, D. [1 ]
Roy, Tapatee Kundu [1 ]
Chakrabarti, Mahuya [1 ]
Dechoudhury, Siddhartha [1 ]
Bhowmick, Debasis [1 ]
Chakrabarti, Alok [1 ]
机构：
[1] Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 04期
关键词：
D O I：
10.1088/0953-8984/20/04/045217
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Coincidence Doppler broadening of the positron annihilation technique has been employed to identify the defects in thermally annealed 'as-received' ZnO and thermally annealed ball-milled nanocrystalline ZnO. Results indicate that a significant amount of oxygen vacancy has been created in ZnO due to annealing at about 500 degrees C and above. The results also indicate that the Zn vacancy created during the ball milling process can be easily removed by annealing the sample at about 500 degrees C and above. The defect characterization has also been correlated with the magnetic properties of ZnO.
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页数：4
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