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实验研究了La2/3Ca1/3MnO3系统晶界上掺杂(YSZ)对其输运性能和磁电阻效应(MR)的影响.样品是由溶胶-凝胶法制成的.通过对样品的电输运特性的测量表明,在掺杂量(x)低于2%时,掺杂引起电阻的增大并降低了金属-绝缘体转变温度:当掺杂量高于2%时电阻逐渐减小,且转变温度增加.而低场磁电阻效应随掺杂量增加,在x=1%时达到最大.

参考文献

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