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).

9972113厄斯金这个实验项目调查结构-磁性能关系的薄膜和超薄薄膜为基础的系统，包括多层堆栈和微米级的二维结构。与理论团体有很强的相互作用。这提供了一种手段，测试理论模型和数值模拟特定的薄膜磁性领域。感兴趣的现象包括新的磁各向异性机制，导致低维，外延相关的薄膜应力和打破跨国对称性，振荡层间磁耦合，磁结构和磁通涡旋之间的相互作用在磁体/超导体薄膜界面。研究涉及光电子能谱，高速克尔偏振仪，和一系列的表征方法。该项目的一个特别优势是能够研究磁畴松弛或改变其极化状态的速度。这提供了有关磁开关时间的基本信息，这是一个具有重大技术和根本利益的领域。该计划通过培训学生和通过对先进微结构和器件中心（CAMD）的重大补充，为区域科学/技术基础设施做出贡献。这是一个实验性的固态物理项目，涉及薄膜磁性。研究内容包括：（1）静态磁现象，（2）动态磁现象，（3）磁性/超导薄膜中的耦合拓扑缺陷。在这个项目中的薄膜结构和磁现象在计算机硬盘，读头和其他磁性结构中发现的磁性结构中得到了回应。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。该项目的一个特别优势是能够研究磁畴松弛或改变其极化状态的速度。这提供了有关磁开关时间的基本信息，这是一个非常有技术意义的领域。该计划通过培训学生和通过对先进微结构和器件中心（CAMD）的重大补充，为区域科学/技术基础设施做出贡献。