Studies of Finite Size Effects on Phase Transitions, using Spin Glasses

使用自旋玻璃研究有限尺寸对相变的影响

• 批准号: 9121481
• 负责人: Jerry Cowen
• 金额: $ 25.23万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9121481&HistoricalAwards=false
• 关键词: Studies; Finite; Size; Effects; Phase

This project involves studies of sputtered multilayer films of spin glass (SG) materials, typically CuMn-based SG alternating with (generally thicker) layers of a non-magnetic metal. These samples are used to study finite size effects, critical behavior, and dimensional cross-over (3d-2d) in both static and dynamic properties of SGs. The work also includes anisotropic superconductivity studies when the non-magnetic metal is a superconductor. An additional effort is devoted to investigations of 1/f noise in SG ordering, and in a mesoscopic single crystal of a semi-magnetic semiconducting SG.

本项目涉及溅射多层膜的自旋 玻璃（SG）材料，通常为CuMn基SG， （通常较厚的）非磁性金属层。 这些样品 用于研究有限尺寸效应、临界行为和 静态和动态的三维交叉（3D-2D） SG的特性。 这项工作还包括各向异性 超导研究时，非磁性金属是 超导体 另外一项努力是专门进行调查 的1/f噪声的SG排序，并在介观单晶 半磁性半导体SG。