权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study of magnetic circular dichroism in hard x-ray emission spectroscopy in the alloys of transitional elements and rare-earth

过渡元素与稀土合金的硬X射线发射光谱磁圆二色性研究

基本信息

批准号：
13450257
负责人：
NANAO Susumu
金额：
$ 9.66万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450257/
关键词：
synchrotron x-rays x-ray emission spectroscopy magnetic circular dichroism magnetic materials magnetic electrons element selection states of electrons magnetic structure 中間状態

项目摘要

Energy spectra of the X-ray emitted via the second order photo-excitation process give quite valuable information on a selected element which directly reflects ground states and excited states of electrons. This type of spectroscopy for inelastic scattering x-rays is named X-ray Emission Spectroscopy (XES).The objective of the present project is to develop the methodology of the spin-dependent magnetic circular dichroism XES (MCD-XES) and the application to transition metals and rare earths.The most remarkable achievement of the present study is that very precise MCD-XES spectra were obtained and the results were quantitatively examined comparing with the theoretical calculations, which for the first time enabled an appropriate interpretation of the origins of the MCD effect and was published in Physical Review.In order to construct the XES beam line at SPring-8, the measuring apparatus and various testing experiments were made by the cooperation with the group of Tohoku University. And the methodologies of the measurements and the analyses for the XES including MCD-XES have been established. Among them, the development of "Lifetime-broadening-suppressed/free XANES" is especially important, which supports the wide development of the applications of MCD-XES.

通过二阶光激发过程发射的x射线能谱对直接反映电子基态和激发态的选定元素提供了相当有价值的信息。这种非弹性散射x射线的光谱被称为x射线发射光谱（x射线发射光谱）。本项目的目的是发展自旋依赖磁圆二色性的方法及其在过渡金属和稀土上的应用。本研究最显著的成就是获得了非常精确的MCD- xes光谱，并将结果与理论计算进行了定量检验，首次对MCD效应的起源进行了适当的解释，并发表在《物理评论》上。为了在SPring-8上构建x射线束线，与日本东北大学课题组合作进行了测量仪器和各种测试实验。并建立了包括MCD-XES在内的XES的测量和分析方法。其中，“寿命加宽抑制/自由XANES”的开发尤为重要，它支持了mcd - x应用的广泛发展。

项目成果

期刊论文数量（66）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Fine structure in the quadrupolar transition of Ho L3 pre-edge by lifetime- broadening- suppressed XANES spectroscopy

通过寿命展宽抑制 XANES 光谱观察 Ho L3 前边缘四极转变的精细结构

DOI：
发表时间：
2005
期刊：
Phys. Rev.B 72
影响因子：
0
作者：
中村建作;瀬戸浩二;Hisashi Hayashi
通讯作者：
Hisashi Hayashi

Extended spin-polarized x-ray absorption near-edge spectra of MnO

DOI：
10.1103/physrevb.70.134427
发表时间：
2004-10
期刊：
Physical Review B
影响因子：
3.7
作者：
H. Hayashi;M. Kawata;Y. Udagawa;N. Kawamura;S. Nanao
通讯作者：
H. Hayashi;M. Kawata;Y. Udagawa;N. Kawamura;S. Nanao

「微分型」X線ラマン散乱分光の試み

“微分型”X射线拉曼散射光谱的尝试

DOI：
发表时间：
2005
期刊：
X線分析の進歩 36
影响因子：
0
作者：
Y.Udagawa;H.Hayashi;A.Sugiyama et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;H.Hayashi et al.;林久史等
通讯作者：
林久史等

Quadrupole transition in Dy L3 edge observed by lifetime-broadening-suppressed XANES spectroscopy

通过抑制寿命展宽的 XANES 光谱观察到 Dy L3 边缘的四极跃迁