Electrical Transport and Magnetoresistance in the Sol-Gel Prepared La2/3Ca1/3Mn1-xTExO3 (x = 0 and 4%, TE=Cu and Zn) Polycrystalline Samples

Chin. Phys. Lett.

2004, Vol. 21

Issue (7): 1352-1355 DOI:

Original Articles

Electrical Transport and Magnetoresistance in the Sol-Gel Prepared La_2/3Ca_1/3Mn_1-xTE_xO₃ (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

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YUAN Song-Liu, LIU Li, ZHONG Qiang-Hua et al 2004 Chin. Phys. Lett. 21 1352-1355

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Abstract A comparative study of electrical transport and magnetoresistance (MR) is performed for sol-gel prepared samples of nominal composition La_2/3Ca_1/3MnO₃, La_2/3Ca_1/3Mn_1-xCu_xO₃ and La_2/3Ca_1/3Mn_1-xZn_xO₃ with x = 4%. Compared with La_2/3Ca_1/3MnO₃, 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.

Keywords: 75.30.Vn 72.25.-b 72.25.Mk

Published: 01 July 2004

PACS:	75.30.Vn
	72.25.-b	(Spin polarized transport)
	72.25.Mk	(Spin transport through interfaces)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2004/V21/I7/01352

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	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

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