相分离体系Nd_(0.8)5Sr_(0.15)CoO_3的弛豫现象  

Magnetic relaxation effects in phase-separated polycrystalline Nd_(0.85)Sr_(0.15)CoO_3

作　　者：杨亦云[1] 任秦安[1] 

机构地区：[1]安康学院物理与计算机科学系,陕西安康725000

出　　处：《安康学院学报》2008年第3期84-85,共2页Journal of Ankang University

基　　金：安康学院专项科研计划资助项目(2007AKXY025)

摘　　要：本文系统地研究了Nd0.85Sr0.15CoO3的弛豫行为.低温下,零场冷却和带场冷却测量曲线呈现镜像对称,并且弛豫行为遵循扩展指数关系.这表明铁磁团簇间的相互作用导致了体系的相分离,从而证实了在Nd0.85Sr0.15CoO3体系中铁磁团簇间的相互作用和自旋玻璃相共同导致了低温时的相分离.In this paper, the magnetic relaxation of Nd0.85Sr0.15CoO3 polycrystalline sample was systematicaUy investigated. Low - temperature zero - field cooling and field cooling magnetic relaxation show perfectly mirror symmetry, and relaxation obeys a stretched exponential form. The results show that the ferromagnetic dusters interaction makes contribution to the phase separation. Therefore, our study conrirms that the phase separation in Nd0.85Sr0.15CoO3 originates from both the ferromagnetic clusters interaction and the spin glasslike phase at low temperature.

关 键 词：自旋玻璃 铁磁团簇 弛豫现象 相分离 

分 类 号：O482.54[一般工业技术—材料科学与工程]