Chin. Phys. Lett.  2014, Vol. 31 Issue (06): 067501    DOI: 10.1088/0256-307X/31/6/067501
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Structure Dependence of Magnetic Properties for Annealed GaMnN Films Grown by MOCVD
JIANG Xian-Zhe1, YANG Xue-Lin 1**, JI Cheng1, XING Hai-Ying2, YANG Zhi-Jian1, WANG Cun-Da1, YU Tong-Jun1**, ZHANG Guo-Yi1
1State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871
2School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387
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JIANG Xian-Zhe, YANG Xue-Lin, JI Cheng et al  2014 Chin. Phys. Lett. 31 067501
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Abstract GaMnN/GaN multilayers and conventional GaMnN single layers are grown by metal-organic chemical vapor deposition. Both kinds of samples show room-temperature ferromagnetism. After thermal annealing, the sample with GaMnN/GaN multilayer structure displays a larger coercivity and better thermal stability compared to the GaMnN single layer. The annealing effects on VGa related defects are observed from photoluminescence measurements. Moreover, a different magnetic behavior is also found in the annealed GaMnN films grown on different (n-type GaN and p-type GaN) templates. These kinds of structure-dependent magnetic behaviors indicate that defects or carriers transformation introduced during annealing may have important effects on the electronic structure of Mn ions and on the ferromagnetism. Our work may be helpful for further understanding the origin of ferromagnetism in GaN-based diluted magnetic semiconductors.
Published: 26 May 2014
PACS:  75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)  
  81.15.Gh (Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))  
  81.05.Ea (III-V semiconductors)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/6/067501       OR      https://cpl.iphy.ac.cn/Y2014/V31/I06/067501
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JIANG Xian-Zhe
YANG Xue-Lin
JI Cheng
XING Hai-Ying
YANG Zhi-Jian
WANG Cun-Da
YU Tong-Jun
ZHANG Guo-Yi
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