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 sam...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.展开更多
基金Funded by the Foundation for the Author of National Excellent Doctoral Dissertation of China (FANEDD) (No. 200233)
文摘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.
