巨磁电阻锰氧化物材料的低温电阻率行为的研究  

Low temperature electrical resistivity of composite manganites

作　　者：王新峰[1] 

机构地区：[1]山东理工大学物理与光电信息技术学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2007年第4期62-65,共4页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：对巨磁电阻锰氧化物材料(1-x)La2/3Ca1/3MnO3/(x)YSZ(钇稳定氧化锆)—(1-x)LCMO/(x)YSZ系列样品低温下电阻率行为进行了研究.(1-x)LCMO/(x)YSZ的R-T曲线低温拟合系数的分析结果表明,在低温下电阻率行为式ρ=0ρ+ATa+BTb中,b=5是合理的,T5代表电子-声子散射项.The low temperature electrical resistivity of （1-x） La2/3 Ca1/3 MnO3 / （x） yttria-stabilized zirconia （1-x） LCMO/（x）YSZ was studied. The low temperature depend resistivity was commonly considered to fit the equation ρ=ρ0＋AT^a＋BT^b, where ρ0 is residual resistivity, a= 2 or 3/2,b= S or 9/2. T^2 is electron-electron scattering term, T^3/2 is the term electron scattered by the disordered spin glasses, Ts is electron-phonon scattering term, T^9/2 is electron-two magnon scattering term. It was pointed out that b = 5 is reasonable, which is electron-phonon scattering term.

关 键 词：巨磁电阻 低温电阻率 电子-声子散射 

分 类 号：O469[理学—凝聚态物理]