High magnetic field effects in the nonequilibrium state

非平衡状态下的高磁场效应

• 批准号: 16350007
• 负责人: KATSUKI Akio
• 金额: $ 9.86万
• 依托单位: SHINSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16350007/
• 关键词: nonequilibrium state; magnetic field effect; magnetic susceptibility force; pseudo microgravity; crystal growth control; thin film; surface tension; metal dendrite; 非平衡状態; 強磁場; 形状磁気異方性; 歳差運動; ローレンツ力

The nonequilibrium process is involved in the general chemical reaction. We focused on the nonequilibrium state as one of the important factors which control the magnetic field effect in our study.The magnetic energy which is very small compared to the thermal energy in the equilibrium state will work sufficiently as the perturbation in the nonequilibrium state.We found that application of the high magnetic field on the growth of diamagnetic metal dendrites caused magnetic orientation tilting by about 30 degrees for the magnetic field, in spite of the metal was the magnetically isotropic crystal. We clarified that the phenomena were based on the shape magnetic anisotropy. In other words even the diamagnetic species is able to orientate by the shape magnetic anisotropy. These phenomena imply that the nonequilibrium in the solid-liquid interface state enhances the magnetic field effect, and that the diamagnetic species of which the magnetic anisotropy is small orientates by the shape magnetic anisotropy. We can expect the phenomena to apply to the other fields, because most of the materials are the diamagnetic species.Precession of the silver dendrites was also observed through the various studies, and it was clarified that the mechanism was boundary-assisted MHD. In addition, on the magnetic field effect at the solid-liquid interface, we found that the morphology change in the crystal shape were occurred by the magnetic force at the solid-liquid interface, and that the water droplet shape change and the formation of a liquid film were possible by the apparent gravity control using the magnetic field.The research of the magnetic field effect for these basic reactions will be connected with the supply of new reaction fields, and the control of chemical reactions and the morphology change of material, and so forth.

一般的化学反应都涉及到非平衡过程。重点研究了非平衡态作为控制磁场效应的重要因素之一，与平衡态的热能相比很小的磁能将充分发挥非平衡态的微扰作用。我们发现，尽管金属是磁性各向同性的晶体，但在强磁场作用下，抗磁性金属枝晶的生长会导致磁场的磁取向倾斜约30度。我们澄清了这些现象是基于形状磁各向异性的。换句话说，即使是反磁物种也能够通过形状磁各向异性来定向。这些现象表明，固-液界面态的非平衡增强了磁场效应，磁各向异性较小的抗磁物种由形状磁各向异性取向。我们可以预期这种现象也适用于其他领域，因为大多数材料都是抗磁性物种。通过各种研究，我们也观察到了银树枝的预退，并澄清了其机制是边界辅助MHD。此外，在固液界面的磁场效应方面，我们发现固-液界面的磁场力使晶体形态发生变化，利用磁场的表观重力控制水滴的形状变化和液膜的形成，研究磁场对这些基本反应的影响，将与提供新的反应场、控制化学反应和材料的形态变化等有关。

项目成果

The Magnetic Orientation of 2-Dimensional Silver Dendrites

• DOI: 10.1246/bcsj.78.1251
• 发表时间: 2005-07
• 期刊: Bulletin of the Chemical Society of Japan
• 影响因子: 4
• 作者: A. Katsuki;Ichiro Uechi;Y. Tanimoto

Synthesis and characterization of flavylium salts having three types color depending on recrystallization conditions

根据重结晶条件具有三种颜色的黄鎓盐的合成和表征

• 发表时间: 2004
• 期刊: Research on Chemical Intermediates 30・3
• 作者: F.Ito;N.Tanaka;A.Katsuki;A.Kakehi;T.Fujii
• 通讯作者: T.Fujii

Effect of high magnetic field on a quasi-3D silver dendrite growing system

• DOI: 10.1080/00268970500490330
• 发表时间: 2006-05
• 期刊: Molecular Physics
• 影响因子: 1.7
• 作者: F. Tang;A. Katsuki;Y. Tanimoto

Influence of high magnetic field on glycine Crystal Growth

高磁场对甘氨酸晶体生长的影响

• 发表时间: 2006
• 期刊: Science Technology of Advanced Materials 7・4
• 作者: M.Sueda;A.Katsuki;Y.Fujiwara;Y.Tanimoto
• 通讯作者: Y.Tanimoto

Magnetic Field Effects in Silver Metal Deposition

银金属沉积中的磁场效应

• 发表时间: 2006
• 期刊: Magneto-Science(M.Yamaguchi, Y.Tanimoto(Eds.)) chapter 3.2 (Kodansha/Springer)
• 作者: Y.Kitagawa;Y.Sentoku;S.Akamatsu;W.Sakamoto;K.A.Tanaka;R.Kodama;H.Nishimura;Y.Inubushi;M.Nakai;T.Watari;T.Norimatsu;A.Sunahara;北川米喜;A.Katsuki
• 通讯作者: A.Katsuki