Investigations of couplings between are earth quadrupolar orderings and lattice vibrations by dichromatic neutron diffraction

通过二色中子衍射研究地球四极有序和晶格振动之间的耦合

• 批准号: 21540350
• 负责人: OHOYAMA Kenji
• 金额: $ 2.91万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21540350/
• 关键词: 強相関系; 多極子秩序; 中性子回折; 粉末構造解析; 結晶モノクロメーター; 希土類四極子; 多波長化; 複色中性子回折; 磁気構造; RIetveld解析; 希土類多極子秩序; 希土類; 格子振動; ダイナミクス; 結晶構造解析; 復色回折実験

The main purpose of this project was to clarify couplings between lattice and quadrupole and magnetic orderings in rare earth antiferroquadrupolar ordering compounds through observations of thermal vibrations of nucleus and magnetic moments. For the observations, we proposed dichromatic neutron using two different wave lengths. We succeeded in upgrading a neutron powder diffractometer by this project. High resolution diffraction experiments with lower wave length, and wide -Q diffraction experiments with high wave length have been feasible on one diffractometer. Though the main experiments could not be performed because of the earthquake, feasibility of the wide-Q experiments with dichromatic beams has been confirmed. Moreover, by the upgrades, neutron holography experiments, and polarised neutronexperiments are realised on the powder diffractometer.

该项目的主要目的是通过观察核和磁矩的热振动来阐明稀土反铁四极有序化合物中晶格和四极之间的耦合以及磁有序。对于观察，我们提出使用两种不同波长的二色中子。通过该项目，我们成功升级了中子粉衍射仪。较低波长的高分辨率衍射实验和高波长的宽Q衍射实验在一台衍射仪上是可行的。虽然主要实验因地震而无法进行，但二色光束宽Q值实验的可行性已得到证实。此外，通过升级，在粉末衍射仪上实现了中子全息实验、偏振中子实验。

项目成果

Modified Cross-Correlation for Efficient White-Beam Inelastic Neutron Scattering Spectroscopy

高效白束非弹性中子散射光谱的改进互相关

• DOI: 10.1016/j.nima.2012.03.001
• 发表时间: 2012
• 作者: K. Tomiyasu

Relationship between structure and superconductivity in FeSel-xTex

FeSel-xTex 结构与超导性的关系

• 发表时间: 2010
• 作者: K.Horigane; H.Hiraka; K.Ohoyama
• 通讯作者: K.Ohoyama

Neutron Holography Measurement as a Novel Probe of Local Structures of Spins and Light Atoms

中子全息测量作为自旋和轻原子局域结构的新型探针

• 发表时间: 2012
• 作者: K. Ohoyama; K. Hayashi; T. Oku; T. Shinohara
• 通讯作者: T. Shinohara

Neutron Holography Measurement as a Novel Probe of Local Structures of Spins and Light Atoms

中子全息测量作为自旋和轻原子局域结构的新型探针

• 发表时间: 2012
• 作者: K. Ohoyama A; K. Hayashi; T. Oku; T. Shinohara
• 通讯作者: T. Shinohara

TmAu2における強四極子秩序相の自発歪み

TmAu2 中强四极有序相的自发畸变

• 发表时间: 2010
• 作者: 小坂昌史; 志田裕; 今成亜弥; 片野進; 大山研司A; 小野寺秀也
• 通讯作者: 小野寺秀也