Experimental Studies of Thin Film Magnetism

薄膜磁性的实验研究

• 批准号: 9972113
• 负责人: James Erskine
• 金额: $ 36万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-12-15 至 2003-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9972113&HistoricalAwards=false
• 关键词: Experimental; Studies; Thin; Film; Magnetism

9972113ErskineThis experimental project investigates structure -- magnetic-property relationships in ultrathin films and ultrathin-film-based systems, including multilayer stacks and micron-scale two-dimensional structures. There are strong interactions with theoretical groups. This provides a means of testing theoretical models and numerical simulations specific to the thin film magnetics area. Phenomena of interest include novel magnetic anisotropy mechanisms resulting from low dimensionally, epitaxy-related films stress and broken transnational symmetry, oscillatory interlayer magnetic couplings, interactions between magnetic structures and flux vortices in magnet/superconductor thin film interfaces. The research involves photoelectron spectroscopy, high-speed Kerr polarimetry, and a range of characterization methods. A particular strength of the project is the ability to study the speed with which magnetic domains relax, or change their state of polarization. This provides fundamental information about magnetic switching times, an area of great technological as well as fundamental interest. The program contributes to regional scientific/technological infrastructure through training of students and through significant additions to the Center for Advanced Microstructures and Devices (CAMD). %%%This is an experimental solid state physics project dealing with thin film magnetism. The research involves (1) static magnetic phenomena, (2) dynamic magnetic phenomena, and (3) coupled topological defects in magnetic/superconducting films. The thin film structures and magnetic phenomena in this project are echoed in magnetic structures found in computer hard discs, read heads, and other magnetic structures. The interest in this work is on fundamental parameters that can be experimentally obtained and compared with theoretical models and simulations. A particular strength of the project is the ability to study the speed with which magnetic domains relax, or change their state of polarization. This provides fundamental information about magnetic switching times, an area of great technological interest. The program contributes to regional scientific/technological infrastructure through training of students and through significant additions to the Center for Advanced Microstructures and Devices (CAMD).

9972113Erskine该实验项目研究超薄膜和基于超薄膜的系统（包括多层堆叠和微米级二维结构）中的结构-磁特性关系。与理论团体有很强的互动。这提供了一种测试特定于薄膜磁性领域的理论模型和数值模拟的方法。感兴趣的现象包括由低维、外延相关薄膜应力和破缺跨国对称性、振荡层间磁耦合、磁性结构和磁体/超导体薄膜界面中的磁通涡旋之间的相互作用产生的新型磁各向异性机制。该研究涉及光电子能谱、高速克尔偏振测定法和一系列表征方法。该项目的一个特殊优势是能够研究磁畴松弛或改变其极化状态的速度。这提供了有关磁切换时间的基本信息，这是一个具有重大技术和基本利益的领域。该计划通过培训学生和对先进微结构和器件中心 (CAMD) 进行重大扩建，为区域科学/技术基础设施做出贡献。 %%%这是一个处理薄膜磁性的实验固态物理项目。该研究涉及（1）静态磁现象，（2）动态磁现象，以及（3）磁性/超导薄膜中的耦合拓扑缺陷。该项目中的薄膜结构和磁性现象与计算机硬盘、读取头和其他磁性结构中的磁性结构相呼应。这项工作的兴趣在于可以通过实验获得并与理论模型和模拟进行比较的基本参数。该项目的一个特殊优势是能够研究磁畴松弛或改变其极化状态的速度。这提供了有关磁切换时间的基本信息，这是一个具有重大技术意义的领域。该计划通过培训学生和对先进微结构和器件中心 (CAMD) 进行重大扩建，为区域科学/技术基础设施做出贡献。