Cr掺杂对La_(0.67)Ca_(0.33)MnO_3物性的影响  

The Influence of Cr Doping on Physicd Characters of La_(0.67)Ca_(0.33)MnO_3

作　　者：彭振生[1] 孙阳[2] 

机构地区：[1]宿州师范专科学校,安徽宿州234000 [2]中国科学技术大学结构分析开放实验室,安徽合肥230026

出　　处：《安徽师范大学学报（自然科学版）》2003年第1期22-25,共4页Journal of Anhui Normal University(Natural Science)

基　　金：国家自然科学重点基金 (1993 40 0 3 )资助

摘　　要：本文研究了Cr掺杂对La0 .6 7Ca0 .33MnO3物性的影响 .探讨了Cr掺杂对晶体结构的影响、Cr掺杂对磁场的影响、Cr掺杂导致的反常电阻和磁电阻行为 ,以及Cr掺杂对La0 .6 7Ca0 .33MnO3极化子输运的影响 .有新的发现 :实验结果显示了特殊的双峰CMR行为 ,而且CMR效应的温区被极大地拓宽 ,从低温区直至室温以上 。In this anticle we have studied the influence of Cr doping on physical characters of La 0.67 Ca 0.33 MnO 3,The in fluence of Cr doping on Crystal structure, on magnetic field, and on polaron transition of La 0.67 Ca 0.33 MnO 3,and the abnormal resistance and magnetic resistance action carsed by Crdoping have been researched There are new discoveries: the experimental results show special double-peak CMR action;moreouer, the temperature range of CMR effect has been extremely expanded, it is between the low temperature range and above the room temperature. So we can conclude that Cr doping at mu site is an effective way of adjusting CMR effect.

关 键 词：LA0.67CA0.33MNO3 物性 CR掺杂 反常电阻 磁电阻 双峰CMR行为 宽温区CMR效应 晶体结构 磁性材料 

分 类 号：O482.54[一般工业技术—材料科学与工程]