Magnetoresistance Plateau in La2/3Ca1/3BixMn1-xO3 Granular System
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2009年第1期
论文作者：张国庆 潘春旭
文章页码：61 - 64
摘 要：The effect of doping additional Bi on the magnetoresistance （MR） of La2/3Ca1/3BxMn1-x O3 was investigated. It is found that traditional colossal magnetoresistance （CMR） peak can only be observed in the x<0.05 samples and the peak value decreases with the increase of x, but the x≥0.05 samples show a magnetoresistance plateau above 200 K because of the presence of additional （La,Ca,Bi）-O layers. Moreover, this MR plateau is enhanced for the segregation of the La, Ca, and Bi elements.
张国庆1，潘春旭1,2
1. Department of Physics,Wuhan University2. Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education,Wuhan University
摘 要：The effect of doping additional Bi on the magnetoresistance （MR） of La2/3Ca1/3BxMn1-x O3 was investigated. It is found that traditional colossal magnetoresistance （CMR） peak can only be observed in the x<0.05 samples and the peak value decreases with the increase of x, but the x≥0.05 samples show a magnetoresistance plateau above 200 K because of the presence of additional （La,Ca,Bi）-O layers. Moreover, this MR plateau is enhanced for the segregation of the La, Ca, and Bi elements.
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