Mn位Cr掺杂对Pr0.5Ca0.5MnO3体系的电荷有序和磁电阻的影响,李文娟,曹世勋,本文研究了钙钛矿型半掺杂锰氧化物Pr0.5Ca0.5Mn1-xCrxO3(x=0,0.03,0.05,0.07,0.10)体系的输运性质、电荷有序和磁电阻效应。结果表明,Cr离子�