Observation of three-dimensional magnetic-moment density distribution in hard magnetic materials by using synchrotron radiation and neutron diffraction

利用同步辐射和中子衍射观测硬磁材料的三维磁矩密度分布

• 批准号: 20540331
• 负责人: ITO Masahisa
• 金额: $ 2.75万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20540331/
• 关键词: X線磁気回折; 磁気モーメント; スピン磁気モーメント; 軌道磁気モーメント; 密度分布; 硬磁性体; 磁気モーメント密度分布; スピンモーメント; 軌道モーメント; 強磁性体; 放射光X線; 希土類化合物; 磁気形状因子; スピン磁気形状因子; 軌道磁気形状因子

We have performed synchrotron X-ray magnetic diffraction experiment of a hard-magnetic material of a rare-earth ferromagnet of CeRh3B2 in which c axis is a magnetically hard axis, and we have obtained spin and orbital magnetic form factors for reciprocal lattice points of hk0 series. We have obtained the total magnetic form factor by summing them up. We have combined X-ray the magnetic form factor for hk0 series by the X-ray magnetic diffraction with the magnetic form factor for 0kl series by the polarized neutron diffraction in the literature, and we have performed the maximum-entropy analysis to the combined magnetic form factor data. Finally three dimensional density distribution of the magnetic moment has been successfully obtained. For the Ce sites, magnetic-moment distribution of 4f electrons has been observed. This research has shown that an experimental method has been developed for observing three dimensional density distributions of hard magnetic materials by utilizing both synchrotron X-ray magnetic diffraction and polarized neutron diffraction.

我们对以c轴为硬磁轴的CeRh3B2稀土铁磁体硬磁材料进行了同步加速器X射线磁衍射实验，得到了hk0系倒易晶格点的自旋和轨道磁形状因子。我们通过将它们相加得到了总的磁性形状因数。我们将文献中通过X射线磁衍射得到的hk0系列磁体形状因数与通过偏振中子衍射得到的0kl系列磁体形状因数结合起来，并对组合后的磁体形状因数数据进行了最大熵分析。最终成功获得了磁矩的三维密度分布。对于 Ce 位点，观察到 4f 电子的磁矩分布。这项研究表明，已经开发出一种利用同步加速器X射线磁衍射和偏振中子衍射来观察硬磁材料三维密度分布的实验方法。

项目成果

Spin, orbital and total magnetic form factor of rare-earth compound CeRh_3B_2 observed by X-ray magnetic diffraction

X射线磁衍射观察稀土化合物CeRh_3B_2的自旋、轨道和总磁形状因子

• 发表时间: 2009
• 期刊: Photon Factory Activity Report 26
• 作者: Kosuke Suzuki;Masahisa Ito;他;Y. Furukawa;Y. Furukawa;Kosuke Suzuki;Ryouta Nagayasu
• 通讯作者: Ryouta Nagayasu

5d原子の磁気形状因子の計算

计算 5d 原子的磁性形状因子

• 发表时间: 2011
• 作者: Kosuke Suzuki;Masahisa Ito;他;Y. Furukawa;Y. Furukawa;Kosuke Suzuki;Ryouta Nagayasu;Ayako Sato;鈴木宏輔;伊藤正久;蓼沼樹;小林幸次郎;永易良太;佐藤綾子;小林幸次郎
• 通讯作者: 小林幸次郎

Spin Density Distribution of YTiO3 Observed by X-Ray Magnetic Diffraction

X射线磁衍射观察YTiO3自旋密度分布

• DOI: 10.4028/www.scientific.net/kem.459.7
• 发表时间: 2010
• 期刊: Key Engineering Materials
• 作者: Kosuke Suzuki;M. Ito;N. Tsuji;H. Adachi;H. Nakao;Y. Murakami;Y. Taguchi;Y. Tokura;E. Nishibori;M. Sakata
• 通讯作者: M. Sakata

Spin and Orbital Magnetic Moment of Pd_3Co Evaluated by X-ray Magnetic Diffraction Experiment

X射线磁衍射实验评估Pd_3Co的自旋和轨道磁矩

• 发表时间: 2011
• 期刊: Key Engineering Materials Vol.459
• 作者: Masahisa Ito;Hiroshi Sakurai;他
• 通讯作者: 他

Spin and orbital magnetic form factor of CeRh_3B_2 observed by X-ray magnetic diffraction

X射线磁衍射观察到的CeRh_3B_2的自旋和轨道磁形状因子

• 发表时间: 2010
• 期刊: Photon Factory Activity Report #27, Part B
• 作者: Ryouta Nagayasu;Yoshichika Onuki;Masahisa Ito;他
• 通讯作者: 他