Formation of Nano-structure Material Using Chaotic Theory and its Physical Properties

混沌理论纳米结构材料的形成及其物理性质

• 批准号: 07455300
• 负责人: ISHIHARA Keiichi
• 金额: $ 4.99万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455300/
• 关键词: chaos; mechanical alloying; sputter; repeated deformation; alloying; kinetics; キネティスク

It is reported that the formation of Fe-Ag nano-layred material can be produced by repeated pressing and rolling ; the repeated plastic deformation of powder and foil. The specimen producedby the repeated rolling is observed the giant magneto-resistance (GMR). The GMR effect has been only reported in the multilayr material the each layr thickness of which is less than 1nm. While the specimen produced by the repeated rolling shows GMR effect, even if the thickness is about 50nm.In this research, the multilayr samples whose layr thickness from 10nm to 100nm were produced by magnetron sputtering. In these material, only 10nm sample shows GMR,0.15% at 77K.While the 70nm sample produced by the repeatedrolling shows GMR,4.5% at 77K.Since the samples produced by the repeated rolling have the distributed layr thickness, The inhomogeneous multilayr sample produced by sputtering is produced. Each layr thickness was simulated by the value which was measured in the repeated rolling sample. This sample shows GMR,1.5% at 77K.Consequently, GMR of homogeneous multilayr sample is larger than that of chaotic multilayr sample.

据报道，可以通过重复按压和滚动可以产生Fe-Ag纳米含量的材料的形成。粉末和箔的重复塑性变形。观察到重复滚动产生的标本巨型磁耐药（GMR）。 GMR效应仅在Multilayr材料中报道了每个Layr厚度小于1nm。尽管重复滚动产生的标本显示GMR效应，但即使厚度约为50nm。在这些材料中，只有10nm样品显示GMR，在77K时显示0.15％。虽然重复滚动产生的70nm样品显示GMR显示GMR，在77K时为4.5％。由于重复滚动产生的样品具有分布式的Layr厚度，但由散布产生了不均匀的多层样品。每个Layr厚度都通过在重复滚动样品中测量的值模拟。该样本显示GMR，在77K时为1.5％。结果，同质多层样本的GMR大于混乱的多层样本。

项目成果

K. N. Ishihara: "Generation of Chaotic Structure by the Repetition of Cold Working" Solid State Phenomena. 42-43. 77-86 (1995)

K. N. Ishihara：“通过重复冷加工产生混沌结构”固态现象。