RuSr_2Eu_(1.4)Ce_(0.6)Cu_2O_(10-δ)超导体的磁特性研究  

THE MAGNETIC PROPERTIES OF SUPERCONDUCTOR RuSr_2Eu_(1.4)Ce_(0.6)Cu_2O_(10-δ)

作　　者：袁春华[1] 钱天[2] 李广[2] 时亮[1] 

机构地区：[1]中国科学技术大学材料科学与工程系,合肥230026 [2]中国科学技术大学物理系,合肥230026

出　　处：《低温物理学报》2007年第2期114-117,共4页Low Temperature Physical Letters

基　　金：国家自然科学基金(项目编号:50302009)资助的课题~~

摘　　要：RuSr2Eu1.4Ce0.6Cu2O10-δ超导样品的交流磁化率曲线在TM2～125K和TP～75K处出现峰值.我们通过测量不同频率下的交流磁化率和电子自旋共振谱,对这两个峰的起源进行了详细的研究。通过对铁磁共振线的强度、线宽和共振场与温度依赖关系的讨论,我们得出TM2附近的峰对应着体系的反铁磁转变.TP处的峰随着测量频率的增加向高温移动,且峰的强度逐渐减小,这一结果证实了体系中存在自旋玻璃态.Two peaks at TM2- 125 K and Tp- 75 K are observed in the curve of temperature dependence of ac susceptibility for superconducting sample RuSr2Eu1.4Ce0.6Cu2O10-δ. The origins of the two peaks were studied in detail by means of ac susceptibility and electron magnetic resonance. According to the results of the temperature dependencies of the intensity, peak at TM2 is a transition of antiferromagnetism. intensity of the peak decreases with the frequency existence of spin glass. linewidth and resonance field, we conclude that the The peak at Tp shifts to higher temperature and the increasing, which is interpreted as evidence of the

关 键 词：Ru-1222 磁特性 ESR 

分 类 号：O511.4[理学—低温物理]