Search of new type of stable icosahedral quasicrystals and study on their structural and physical properties

新型稳定二十面体准晶的寻找及其结构和物理性质研究

• 批准号: 14350336
• 负责人: ISHIMASA Tsutomu
• 金额: $ 9.47万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350336/
• 关键词: guasicrystal; icosahedral phase; stable phase; Zn-Sc alloy; Hume-Rothery; rule; spin glass; 電子化合物; 平衡相; Zn基合金; Cu基合金; 高完全性; P型

Starting from Zn17Sc3-type approximant crystals, new icosahedral quasicrystals have been discovered in many Zn-based and Cu-based alloys : They are Zn-(Mg,Mn,Fe,Co,Ni,Cu,Pd,Ag,Pt,Au)-Sc, Zn-Mg-Yb and Cu-Ga-Mg-Sc. These new quasicrystals belong to P-type and have structural similarity to the Cd-based and the Ag-In-based quasicrystals. Among them Zn-(Mg,Fe,Co,Ni,Pd,Ag)-Sc and Cu-Ga-Mg-Sc, are thermodynamically stable and exhibit very high degree of structural perfection. All these quasicrystals, called Tsai-type in this report, have common properties as follows : The base metals are divalent or effectively divalent, namely Zn, Cd, Cu-Ga and Ag-In. They further include approximately 15 at.% of trivalent Sc or lanthanoid metals as well as divalent Ca or Yb. Addition of few percent of the third component has decisive role for stabilizing the quasicrystal structures except for the cases of binary stable quasicrystals, Cd-Yb and Cd-Ca. The substitution relationship in these quasicrystals indicates the important role of Hume-Rothery rule for the formation of Tsai-type quasicrystals.

从ZN17SC3型近似晶体开始，在许多基于Zn的基于Zn的和Cu的合金中都发现了新的二十面体准晶体：它们是Zn-（MG，MG，MN，FE，CO，CO，NI，CU，CU，CU，CU，CU，CU，PD，PT，AG，PT，AU）这些新的准晶体属于P型，与基于CD的基于AG-IN的准晶体具有结构相似性。其中包括Zn-（Mg，Fe，Co，Ni，Pd，Ag）-SC和Cu-GA-MG-SC是热力学稳定的，并且表现出非常高的结构完美。在本报告中，所有这些称为tsai型的准晶体具有共同的特性，如下所示：碱金属是二价或有效二价的，即Zn，cd，cu-ga和ag-in。它们进一步包括三价SC或Lanthanoid Metals以及二价CA或YB的大约15％。除了二元稳定的准晶体，CD-YB和CD-CA的病例外，几个第三个成分的添加在稳定准晶结构方面具有决定性作用。这些准晶体中的替代关系表明，休ume-Rothery规则在形成Tsai型准晶体中的重要作用。

项目成果

T.Ishimasa, Y.Kaneko, H.Kaneko: "A Zn-based icosahedral quasicrystal classified into the same structure typeas Cd-based icosahedral quasicrystals?"J. Alloys. Comp.. 342. 13-17 (2002)

T.Ishimasa, Y.Kaneko, H.Kaneko：“锌基二十面体准晶与镉基二十面体准晶属于相同的结构类型？”J.

S.Motomura, Y.Kaneko, S.Kashimoto, H.Nakano, T.Ishimasa, S.Matsuo: "Magnetic and electrical properties of Zn-Mg-Sc icosahedral quasicrystals"J.Non-Crys.Solids. 334-335. 393-397 (2004)

S.Motomura、Y.Kaneko、S.Kashimoto、H.Nakano、T.Ishimasa、S.Matsuo：“Zn-Mg-Sc 二十面体准晶体的磁电性质”J.Non-Crys.Solids。

Hume-Rothery rule as a formation condition of new icosahedral quasicrystals

休谟-罗瑟里规则作为新二十面体准晶的形成条件

• 发表时间: 2005
• 期刊: TMS symposium proceedings "The science of complex alloy phases", 2005
• 作者: S.Kashimoto;S.Motomura;S.Francoual;S.Matsuo;T.Ishimasa;T.Ishimasa
• 通讯作者: T.Ishimasa

Long range antiferromagnetic order in Ising model simulations in two-dimensional Penrose lattice

二维彭罗斯晶格伊辛模型模拟中的长程反铁磁序

• 发表时间: 2004
• 期刊: J.Non-Crys.Solids 334-335
• 作者: S.Matsuo;S.Fujiwara;H.Nakano;T.Ishimasa
• 通讯作者: T.Ishimasa

Icosahedral quasicrystals in Zn-T-Sc(T=Mn,Fe,Co,Ni) alloys

Zn-T-Sc(T=Mn,Fe,Co,Ni)合金中二十面体准晶

• 发表时间: 2004
• 期刊: Phil.Mag Lett. 84
• 作者: R.Maezawa;S.Kashimoto;T.Ishimasa
• 通讯作者: T.Ishimasa