摘要
在北京同步辐射装置(BSRF)1W1B光束线和XAFS实验站上国内首次建立了硬X射线波段的磁圆二色实验(XMCD)方法．以单晶金刚石作为相位延迟片,在透射劳埃(Laue)模式下,利用衍射双折射效应,将入射的单色线偏振光转变为相应的左旋和右旋圆偏振光,测量磁化样品对左旋和右旋圆偏振光吸收的差异,获得了XMCD信号．本实验使用透射方法测量了Pt-Fe合金Pt L2,3边的XMCD,获得了XMCD信号．XMCD实验方法的建立,为研究磁性材料尤其是磁性薄膜材料的电子结构和磁结构提供了实验基础．
Magnetic circular dichroism spectroscopy using hard X-rays was established at 1W1B beamline and XAFS experimental station of Beijing Synchrotron Radiation Facility. The left and right circularly polarized X-rays were obtained by converting the incident linearly polarized X-rays using a phase retarder made of diamond crystal working at Laue geometry. XMCD spectra of disordered Pt-Fe alloys at Pt L2 and L3 edge were measured in transmission mode and a dramatic XMCD signal was observed. The performance of this method was evaluated and demonstrated.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2006年第10期1022-1026,共5页
High Energy Physics and Nuclear Physics
基金
中国科学院高能物理研究所知识创新工程基金资助~~
关键词
同步辐射
X射线磁圆二色(XMCD)
磁性材料
偏振光
相位延迟片
求和规则
synchrotron radiation, X-ray magnetic circular dichroism（XMCD）, magnetic material, polarized X-rays,phase retarder, sum rule
