International Postdoctoral Fellows Program: Magnetic Properties of Metallic Multilayers

该奖项隶属于国际博士后研究员计划，该计划使美国科学家和工程师能够在国外公认的卓越中心进行三到十二个月的研究。该计划的奖励为联合研究提供了机会，并利用独特或互补的设施、专业知识和国外的实验条件。该奖项将支持苏珊·米尼博士对巴黎南方大学进行为期12个月的博士后研究访问，与阿兰·方丹博士合作。他们的研究目的是利用磁性圆x射线二色光谱（MCXD）研究金属多层膜的磁性能。这种新的光谱技术的重要性在于可以选择性地探测每一种原子。MCXD是一种用于研究有序磁系统中局域和流动磁性的高能谱方法。它利用了x射线吸收光谱的选择性和同步辐射的极化特性，是研究局部磁性能的有力工具。由于它可以选择性地探测材料中每种原子的每个核心轨道，因此可以推断出多层材料中每种原子的磁贡献。多层感兴趣的包括Fe/Pd系统，因为Fe-Pd（100）界面似乎经历了最小的混合，并且与许多其他系统不同，Fe似乎在界面Pd原子层中诱导磁矩ıC。Liu et al., j . apple。物理学67,5758 '90！由于MCXD是元素特异性的，因此可以分别观察到Fe和Pd的磁矩贡献。MCXD可用于解决有关多层界面磁性的特定问题。该奖项建议提供国际旅费、12个月的津贴、1,000美元前往格勒诺布尔进行实验的旅费和少量语言培训津贴。

This award is under the International Postdoctoral Fellows Program, which enables U.S. scientists and engineers to conduct three to twelve months of research at foreign centers of proven excellence. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a twelve-month postdoctoral research visit by Dr. Susan Mini to the Universite Paris-Sud to work with Dr. Alain Fontaine. The aim of their research will be to study the magnetic properties of metallic multilayers using magnetic circular x-ray dichroism spectroscopy (MCXD). The importance of this new spectroscopic technique is that each atomic species can be probed selectively. MCXD is a high energy spectroscopic method which has been used for the study of localized and itinerant magnetism in ordered magnetic systems. It is a powerful tool for the study of the local magnetic properties because it takes advantage of the selectivity of x-ray absorption spectroscopy and the polarization properties of synchrotron radiation. Because it can selectively probe each core orbital of each atomic species in a material, the magnetic contribution of each species in a multilayer may be deduced. Multilayers of interest include Fe/Pd systems because the Fe-Pd(l00) interface appears to experience minimal mixing and unlike many other systems the Fe appears to induce a magnet moment in the interfacial Pd atomic layer ıC.Liu et al., J.Appl. Phys 67, 5758 '90!. Since MCXD is element specific, the magnetic moment contributions of the Fe and Pd may be observed separately. MCXD can be used to address specific problems concerning the magnetism of multilayer interfaces. The award recommendation provides funds to cover international travel, a stipend for twelve months, and $1,000 for travel to Grenoble to conduct experiments and a small allowance for language training.