Electrical Transport and Magnetoresistance in the Sol-Gel Prepared La2/3 Ca1/3 Mn1-x TEx O3 (x = 0 and 4%, TE=Cu and Zn) Polycrystalline Samples
YUAN Song-Liu, LIU Li, ZHONG Qiang-Hua, CAO Heng, XIAO Xun, CHEN Wei, MIAO JU-Hong, NIU Le-Yuan, ZHANG Guo-Hong, XIA Zheng-Cai, LIU Sheng
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Electrical Transport and Magnetoresistance in the Sol-Gel Prepared La2/3 Ca1/3 Mn1-x TEx O3 (x = 0 and 4%, TE=Cu and Zn) Polycrystalline Samples
YUAN Song-Liu;LIU Li;ZHONG Qiang-Hua;CAO Heng;XIAO Xun;CHEN Wei; MIAO JU-Hong;NIU Le-Yuan;ZHANG Guo-Hong;XIA Zheng-Cai;LIU Sheng
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
关键词 ：
75.30.Vn ,
72.25.-b ,
72.25.Mk
Abstract ： A comparative study of electrical transport and magnetoresistance (MR) is performed for sol-gel prepared samples of nominal composition La2/3 Ca1/3 MnO3 , La2/3 Ca1/3 Mn1-x Cux O3 and La2/3 Ca1/3 Mn1-x Znx O3 with x = 4%. Compared with La2/3 Ca1/3 MnO3 , the introduction of Cu or Zn causes a significant downward shift of insulator--metal transition and a sharp MR peak near the transition. The sharp MR peak becomes observable even upon the application of low magnetic fields. It is also shown that although the same behaviour of transport and MR is observed, the sample containing Cu stands out clearly from the sample containing Zn for a substantial enhancement in MR near the transition.
Key words ：
75.30.Vn
72.25.-b
72.25.Mk
出版日期: 2004-07-01
引用本文:
YUAN Song-Liu;LIU Li;ZHONG Qiang-Hua;CAO Heng;XIAO Xun;CHEN Wei; MIAO JU-Hong;NIU Le-Yuan;ZHANG Guo-Hong;XIA Zheng-Cai;LIU Sheng. Electrical Transport and Magnetoresistance in the Sol-Gel Prepared La2/3 Ca1/3 Mn1-x TEx O3 (x = 0 and 4%, TE=Cu and Zn) Polycrystalline Samples[J]. 中国物理快报, 2004, 21(7): 1352-1355.
2/3 Ca1/3 Mn1-x TEx O3 (x = 0 and 4%, TE=Cu and Zn) Polycrystalline Samples. Chin. Phys. Lett., 2004, 21(7): 1352-1355.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2004/V21/I7/1352
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2004, Vol. 21 
