摘要
通过实验研究了La0 6 7-xSmxSr0 33MnO3(x =0 0 0 ,0 10 ,0 2 0 ,0 30 )体系的M_T曲线、ESR曲线、红外光谱、拉曼光谱、ρ_T曲线和MR_T曲线 .实验结果表明 :随着Sm掺杂的增加 ,体系从长程铁磁有序向自旋团簇玻璃态和反铁磁状态转变 ,Sm掺杂引起的磁结构变化和额外磁性耦合将导致CMR效应 .
In this paper, the M-T curves, ESR, Infrared and Raman spectra, rho-T curves and MR-T curves of La0.6-x Sm-x Sr-0.33 MnO3 ( X = 0.00, 0.10, 0.20, 0.30) are studied. The experimental results indicate that with increasing Sm content, the compound undergoes a transition from long-range ferromagnetic order to the cluster-spin glass state, and further to antiferromagnetic order. The variation in magnetic structure and extra magnetic coupling caused by Sm doping lead to colossal magnetoresistance effect.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第2期912-919,共8页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :1993 40 0 3 )
国家重点基础研究发展规划项目 (批准号 :0 0 1CB610 60 4)资助的课题~~
