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Structure and magnetic properties of (Al, Co) Co-doped ZnO thin films (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Materials Science and Nanotechnology, ICMSN 2012, November 16, 2012 - November 18, 2012, Guangzhou, China
Cao P.; Bai Y.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
In this study  Zn0.99Co0.01Al0.015O thin film has been prepared by sol-gel method. The structural and magnetic properties of the sample were investigated. X-ray diffraction spectroscopy analyses indicate that the Co and Al codoping can not disturb the structure of ZnO. No additional peaks are observed in the Zn0.99Co0.01Al xO and Al3+ and Co2+ substitute for Zn 2+ without changing the wurtzite structure. The resistance measurements confirm that Al ions increase the free carriers concentration. Based on the above experiments we think the ferromagnetic behavior of the sample could not originate from Co nanoclusters. The presence of free carriers and localized d spins is a prerequisite for the appearance of ferromagnetism. As the result  the carriers generated by Al doping is considered a main factor to induce the ferromagnetic phenomenon. (2013) Trans Tech Publications  Switzerland.  
Simulation of temperature-dependent resistivity for manganite La1/3Ca2/3MnO3 期刊论文  OAI收割
CHINESE PHYSICS LETTERS, 2006, 卷号: 23, 期号: 6, 页码: 1551
Cao, SO; Zhou, QL; Guan, DY; Lu, HB; Yang, GZ
收藏  |  浏览/下载:29/0  |  提交时间:2013/09/24
Crystallization behaviour of amorphous (Fe0.99Mo0.01)(78)Si9B13 alloy 期刊论文  OAI收割
Journal of Physics D-Applied Physics, 2002, 卷号: 35, 期号: 6, 页码: 503-507
J. I. Akhter; M. A. Shaikh; M. Siddique; M. Ahmad; M. Iqbal; Z. Q. Hu
收藏  |  浏览/下载:23/0  |  提交时间:2012/04/14
Nanocrystallization process and ferromagnetic properties of amorphous (Fe0.99Mo0.01)(78)Si9B13 ribbons 期刊论文  OAI收割
Current Applied Physics, 2002, 卷号: 2, 期号: 3, 页码: 187-191
X. C. Sun; J. Reyes-Gasga; N. Nava; W. S. Sun
收藏  |  浏览/下载:17/0  |  提交时间:2012/04/14
非晶(Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13)合金等温晶化动力学 期刊论文  OAI收割
金属学报, 1992, 期号: 11, 页码: 65-69
刘学东; 王景唐
收藏  |  浏览/下载:13/0  |  提交时间:2012/04/12
硕士论文-J/ψ衰变到2(pai+pai-)°p和2(K+K-)终态的强衰变研究 学位论文  OAI收割
硕士, 北京: 中国科学院研究生院, 1991
作者:  
陈少敏
收藏  |  浏览/下载:24/0  |  提交时间:2015/10/12
The  J/Ψ  hadronic  decays  involving  2(π+π-)π°and  2(K+K-)  final  states  are  investigated  by  using  the  sample  of  2.5  *  10~6  J/Ψ's  which  were  obtained  from  the  BES  detector  at  BEPC  in  the  first  half  of  1990.  Some  signals  such  as  ω(782)  φ(1020)  f2(1270)  f2'(1525)  θ/f2(1720)  b1(1235)  and  a2(1320)  have  been  found  and  measured  the  mass  width  and  branching  fraction  of  reasonance  states.  The  results  are  agreement  with  the  world  average  values.  The  ratio  of  Br(J/Ψ    ω  f2(1270))/Br(J/Ψ→ρ°a2°)  shows  that  doubly  OZI  violating  effects  play  a  role  in  the  J/Ψ    ω  f2(1270)  f2(1270)    π+π-  are  given  in  the  first  time:  x  =  0.99  ±  0.29  Y  =  -0.24  ±  0.17  Z1  =  0.90  ±  0.57  Z2  =  0.56  ±  0.22.