| 硬X射线磁圆二色实验方法的建立 |
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| 引用本文： | 周海涛,陶冶,刘涛,黎刚,朱满康. 硬X射线磁圆二色实验方法的建立[J]. 中国物理 C, 2006, 30(10): 1022-1026 |
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| 作者姓名： | 周海涛 陶冶 刘涛 黎刚 朱满康 |
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| 作者单位： | [1]中国科学院高能物理研究所,北京100049 [2]北京工业大学材料科学与工程学院,北京100022 |
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| 基金项目： | 中国科学院知识创新工程基金 |
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| 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.
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| 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 |
| 收稿时间： | 2005-12-23 |
| 修稿时间： | 2005-12-23 |
Set-Up of Magnetic Circular Dichroism of Hard X-Rays Range at Beijing Synchrotron Radiation Laboratory |
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| ZHOU Hai-Tao,TAO Ye,LIU Tao,LI Gang,ZHU Man-Kang. Set-Up of Magnetic Circular Dichroism of Hard X-Rays Range at Beijing Synchrotron Radiation Laboratory[J]. High Energy Physics and Nuclear Physics, 2006, 30(10): 1022-1026 |
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| Authors: | ZHOU Hai-Tao TAO Ye LIU Tao LI Gang ZHU Man-Kang |
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| Affiliation: | 1.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; 2 .College of Material Science and Engineering, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | 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. |
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| Keywords: | synchrotron radiation X-ray magnetic circular dichroism(XMCD) magnetic material polarized X-rays phase retarder sum rule |
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