Magnetic impurity in the quasicrystals and search for new physical properties

准晶体中的磁性杂质和寻找新的物理性质

• 批准号: 20560612
• 负责人: SATO Taku
• 金额: $ 3万
• 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 (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-20560612/
• 关键词: 磁性; 準結晶; 中性子散乱

Quasicrystal is a new form of solid that has a well-ordered but spatially aperiodic atomic structure, and therefore its physical property is of significant interest among researchers. An approximant is a crystalline material that has a local atomic cluster very similar to the quasicrystal, nevertheless, has spatial periodicity, and hence understanding its physics property is important to reveal intrinsic difference to the quasicrystals. In this work, we have investigated magnetic-impurity effect in the quasicrystals, systematically studied the magnetic properties of approximants, and also explored for new physical properties in related crystalline materials. As a result, we found that the magnetic impurity has very similar inter-spin correlations as those found in the dense magnetic quasicrystal, and that the magnetic approximant also shows almost identical spin correlations to those in the quasicrystals. The result suggests that the spin correlations are determined by the local atomic cluster both in the quasicrystal and approximants, as well as by its local electronic structure. We also found several interesting properties in related crystalline materials.

准晶是一种具有良好有序但空间非周期性原子结构的新型固体，因此其物理性质引起了研究人员的极大兴趣。近似物是一种晶体材料，具有与准晶非常相似的局部原子簇，但具有空间周期性，因此了解其物理性质对于揭示准晶的本质差异很重要。本文研究了准晶中的磁杂质效应，系统地研究了准晶近似物的磁性，并探索了相关晶体材料的新的物理性质。结果发现，磁性杂质与致密磁性准晶具有非常相似的自旋间关联，磁性近似物也具有与致密磁性准晶几乎相同的自旋间关联.结果表明，自旋关联不仅取决于准晶和近似体中的局域原子团簇，而且还取决于其局域电子结构。我们还在相关的晶体材料中发现了一些有趣的性质。

项目成果

Inelastic neutron scattering study on anisotropic-exchange and Dzyaloshinsky-Moriya interactions in the S=1/2 triangular spin cluster V3

S=1/2 三角形自旋团簇 V3 中各向异性交换和 Dzyaloshinsky-Moriya 相互作用的非弹性中子散射研究

• 发表时间: 2009
• 期刊: J.Phys.Soc.Jpn. 78
• 作者: K.Iida;H.Ishikawa;T.Yamase;T.J.Sato
• 通讯作者: T.J.Sato

Neutron scattering situation in Japan

日本的中子散射情况

• 发表时间: 2009
• 作者: Norihito Fujita;et.al.;T.J.Sato
• 通讯作者: T.J.Sato

Short-range spin correlations and superparamagnetic behavior in beta'-LiFeO2

β-LiFeO2 中的短程自旋相关性和超顺磁行为

• 发表时间: 2010
• 期刊: Phys.Rev.B 81
• 作者: R.Akiyama;Y.Ikedo;M.Mansson;T.Goko;J.Sugiyama;D.Andreica;A.Amato;K.Matan;T.J.Sato
• 通讯作者: T.J.Sato

磁性準結晶の磁気励起の起源

磁性准晶体中磁激发的起源

• 发表时间: 2008
• 作者: 吉田亨次;山口敏男;鬼柳亮嗣;横尾哲也;河西学;佐藤卓;佐藤卓;K.Nasu;K.Nasu;K.Nasu;小林元康;高原淳;高原淳;高原淳;高原淳;高原淳;小林元康;高原淳;伊藤晋一;M.Takahashi;佐藤卓;佐藤卓;佐藤卓;佐藤卓
• 通讯作者: 佐藤卓

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