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Chin. Phys. B, 2010, Vol. 19(2): 027502    DOI: 10.1088/1674-1056/19/2/027502
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Effect of annealing atmosphere on ferromagnetism in Mn doped ZnO films

Liu Xing-Chong(刘兴翀)a)†, Lu Zhi-Hai(陆智海)b), and Zhang Feng-Ming(张凤鸣)b)
a Institute of High Energy Electronics, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China; b Department of Physics, Nanjing University, Nanjing 210093, China
Abstract  This paper reports that Zn0.97Mn0.03O thin films have been prepared by radio-frequency sputtering technology followed by rapid thermal processing in nitrogen and oxygen ambient respectively. Magnetic property investigation indicates that the films are ferromagnetic and that the Curie temperature (Tc) is over room temperature. It is observed that the saturation magnetization of the films increases after annealing in nitrogen ambience but decreases after annealing in oxygen. Room temperature photoluminescence spectra indicate that the amount of defects in the films differs after annealing in the different ambiences. This suggests that the ferromagnetism in Zn0.97Mn0.03O films is strongly related to the defects in the films.
Keywords:  magnetic semiconductor      ZnO      photoluminescence  
Received:  05 December 2008      Revised:  01 April 2009      Accepted manuscript online: 
PACS:  75.70.Ak (Magnetic properties of monolayers and thin films)  
  81.40.Ef (Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)  
  75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  75.50.Pp (Magnetic semiconductors)  
  78.55.Et (II-VI semiconductors)  
Fund: Project supported by the National Key Program for Fundamental Research Development Plan of China (973 Project).

Cite this article: 

Liu Xing-Chong(刘兴翀), Lu Zhi-Hai(陆智海), and Zhang Feng-Ming(张凤鸣) Effect of annealing atmosphere on ferromagnetism in Mn doped ZnO films 2010 Chin. Phys. B 19 027502

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