期刊文献+

Enhanced Magnetoresistance of (La0.67Ca0.33MnO3) Composites Coated by Zn0.95Co0.05O

Enhanced Magnetoresistance of (La0.67Ca0.33MnO3) Composites Coated by Zn0.95Co0.05O
下载PDF
导出
摘要 La0.7Ca0.3MnO3:xZn0.95Co0.05O (x=0.0,0.05, 0.1, 0.15mol) composites are prepared by a sol-gel process. X- ray diffraction and energy diffraction spectroscopy reveal that there is no evidence of a reaction between the La0.7 Ca0.3 MnO3 (LCMO) and Zn0.95Co0.05 O (ZCO). Magnetization M, Curie temperature Tc and metal-insulator transition temperatures Tp are observed to decrease with increasing ZCO content. Compared with x = 0.0, a great enhancement in the magnetoresistance (MR) is observed at around Tc for x = 0.05, 0.10, 0.15. Based on the tunneling MR and percolation models, this great change of MR is well explained. La0.7Ca0.3MnO3:xZn0.95Co0.05O (x=0.0,0.05, 0.1, 0.15mol) composites are prepared by a sol-gel process. X- ray diffraction and energy diffraction spectroscopy reveal that there is no evidence of a reaction between the La0.7 Ca0.3 MnO3 (LCMO) and Zn0.95Co0.05 O (ZCO). Magnetization M, Curie temperature Tc and metal-insulator transition temperatures Tp are observed to decrease with increasing ZCO content. Compared with x = 0.0, a great enhancement in the magnetoresistance (MR) is observed at around Tc for x = 0.05, 0.10, 0.15. Based on the tunneling MR and percolation models, this great change of MR is well explained.
机构地区 Department of Physics
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2009年第5期224-227,共4页 中国物理快报(英文版)
  • 相关文献

参考文献17

  • 1Von-Helmolt R, Wecker J, Holzapfel B, Schultz L and Samwer K1993 Phys. Rev. Left. 71 2331.
  • 2Ziese M 2002 Rep. Prog. Phys. 65 143.
  • 3Tang T, Cao Q Q, Gu K M, Xu H Y, Zhang S Y and Du Y W 2000 Appl. Phus. Lett. 77 7.
  • 4Yuan X B, Liu Y H, Wang C J and Mei L M 2006 Appl. Phys. Lett. 88 042508.
  • 5Petrov D K, Krusin-Elbaum L, Sun J Z, Feild C and Duncombe P R 1999 Appl. Phys. Lett. 75 995.
  • 6Zhang N and Wang M 2006 Appl. Phys. Lett. 88 122111.
  • 7Kang B S, Wang H, MacManus-Driscoll J L, Li Q Y, Jia X, Mihut I and Betts J B 2006 Appl. Phys. Left. 88 192514.
  • 8Gaur A, Varma G D and Singh H K 2006 J. Phys. D: Appl. Phys. 39 3531.
  • 9Chen S Y, Lai H, Lin Y B, Ke W P, Zhang F M, Huang Z G and Du Y W 2006 J. Magn. Magn. Mater. 303 e308.
  • 10Miao J H, Yuan S L, Xiao X, Ren G M, Yu G Q, Wang Y Q and Yin S Y 2007 J. Appl. Phys. 101 043904.

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部