Pr_(0.5)La_(0.2)Sr_(0.3)MnO_3的电磁性能及其庞磁电阻效应  

Electromagnetic Properties and CMR of the Pr_(0.5)La_(0.2)Sr_(0.3)MnO_3

作　　者：杨少波[1] 

机构地区：[1]北京印刷学院,北京102600

出　　处：《北京印刷学院学报》2015年第6期59-60,64,共3页Journal of Beijing Institute of Graphic Communication

摘　　要：锰氧化合物在计算机硬盘和磁头等领域有着广泛的应用。本实验用高温烧结法制备了半掺杂锰氧化合物Pr_(0.5)La_(0.2)Sr_(0.3)MnO_3陶瓷,测试结果表明,在温度从5K增加到300K的过程中,样品依次由反铁磁绝缘体转变为铁磁半导体、铁磁金属、顺磁半导体。在发生反铁磁-铁磁和铁磁-顺磁两种转变温度处,样品在较低的外加磁场作用下,都表现出了较强的庞磁电阻效应。The magnetism provides an extensive application prospect for hard-disk and magnetic head. The Pr0.5La0.2Sr0.3MnO3 ceramic is prepared by a high temperature sintering method. The results show that the sample transits to antiferromagnetic insulator to ferromagnetic semiconductor,ferromagnetic metal and finally to paramagnetic semiconductor when the temperature is increased from 5K to 300 K. But also,correspond to the antiferromagnet-ferromagnet transition and the ferromagnet-paramagnet transition,the sample displays obvious magnetoresistance effect in a relative low magnetic field respectively.

关 键 词：半掺杂锰氧化物 电磁性能 庞磁电阻 

分 类 号：TM227[一般工业技术—材料科学与工程]