Transport Properties of Rare Earth Manganese Oxide La0.67Ca0.33Mn1-xFexO3

张金仓¹，余森江¹，韩雁冰²，葛洪良²，崔玉建²，贾广强¹

(1.Department of Physics,Shanghai University,Shanghai 200436,China;
2.Department of Physics,China Institute of Metrology,Hangzhou 310018,China)

Abstract:The transport properties were studied for rare earth manganese oxide La0.67Ca0.33Mn1-xFexO3(x=0～0.3) systems.It is found that with increasing Fe3+-doping content x,the resistance increases and the insulator-metal transition temperature(TIM) shifts to lower temperature.If the doping content is small,the transport properties manifest metallic characteristics in the temperature range of TTIM.Such a behavior may be attributed to the Fe3+-doping and possible Mn ions scattering to electrons.The Fe3+ doping may lead to the formation of Fe3+-O2--Mn4+ channels,which could terminate the double exchange Mn3+-O2--Mn4+ channels.The antiferromagnetic clusters of Fe ions may induce the Mn ions to scetter to the electrons.

Key words:metal material; transport properties; Fe doping; La2/3Ca1/3MnO3; rare earths;

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