Neutron scattering spectroscopic study on spin dynamics of metallic ferromagnets and a practical use of high-luminosity neutron monochromators

金属铁磁体自旋动力学的中子散射光谱研究及高光度中子单色仪的实际应用

• 批准号: 22340089
• 负责人: HIRAKA Haruhiro
• 金额: $ 5.74万
• 依托单位: High Energy Accelerator Research Organization (2012-2013)Tohoku University (2010-2011)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22340089/
• 关键词: 金属磁性; 中性子散乱; 結晶モノクロメータ; 遍歴電子磁性; スピンダイナミクス; 中性子モノクロメータ; モノクロメータ結晶; 結晶工学

Spin dynamics of metallic magnets were studied by using pulsed neutrons and reactor-based neutrons. In particular, for a metallic antiferromagnet system (Mn,Fe)3Si, we succeeded in observing magnetic excitations in a wide energy range of 1~100 meV. As a result, a switching of spin dynamics from localized-spin nature to itinerant-electron spin one was clarified.At the same time, we developed a new type of neutron-monochromator crystals and revealed that Ge-semiconductor crystals, which were plastically deformed in a curved shape, were available for neutron-focusing-monochromator components.

使用脉冲中子和基于反应器的中子研究了金属磁体的自旋动力学。特别是，对于金属抗铁磁铁系统（MN，FE）3SI，我们成功地观察了1〜100 MEV的宽能量激发。 As a result, a switching of spin dynamics from localized-spin nature to itinerant-electron spin one was clarified.At the same time, we developed a new type of neutron-monochromator crystals and revealed that Ge-semiconductor crystals, which were plastically deformed in a curved shape, were available for neutron-focusing-monochromator components.

项目成果

Incommensurate spin correlations induced by magnetic Fe ions substituted into overdoped Bi_<1.75>Pb_<0.35>Sr_<1.90>Cu_<0.91>Fe_<0.09>O_<6+z>

磁性Fe离子取代过掺杂Bi_<1.75>Pb_<0.35>Sr_<1.90>Cu_<0.91>Fe_<0.09>O_<6 z>引起的不相称自旋相关性

• 发表时间: 2010
• 期刊: Phys.Rev.B
• 作者: H.Hiraka;他14名
• 通讯作者: 他14名

Fe-doping effects on magnetism in hole-type superconductors of (Bi,Pb)2Sr2CuO6

Fe掺杂对(Bi,Pb)2Sr2CuO6空穴型超导体磁性的影响

• 发表时间: 2010
• 期刊: J. Phys. Conference Series
• 作者: H. Hiraka;S. Wakimoto;M. Takeda;K. Kakurai;D. Matsumura;Y. Nishihata;J. Mizuki;K. Yamada
• 通讯作者: K. Yamada

金属強磁性体CoS_2における常磁性磁気相関の偏極中性子散乱研究

金属铁磁材料CoS_2中顺磁磁关联的偏振中子散射研究

• 发表时间: 2011
• 作者: 平賀晴弘;脇本秀一;武田全康;加倉井和久
• 通讯作者: 加倉井和久

JRR-3に設置している東北大学中性子散乱装置の現状

JRR-3上安装的东北大学中子散射装置的现状

• 发表时间: 2012
• 期刊: 日本中性子科学会誌「波紋」
• 作者: 岩佐和晃;平賀晴弘;大河原学;大山研司
• 通讯作者: 大山研司

塑性変形したGe半導体結晶ウェーハの中性子反射率II

塑性变形Ge半导体晶片的中子反射率II

• 发表时间: 2011
• 作者: 平賀晴弘;山田和芳;大久保一馬;古坂道弘;鬼柳善明;森下浩平;中嶋一雄
• 通讯作者: 中嶋一雄