Magnetization Processes in Ultrathin Epitaxial Films

超薄外延薄膜的磁化过程

• 批准号: 9531115
• 负责人: Andrew Zangwill
• 金额: $ 22.4万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9531115&HistoricalAwards=false
• 关键词: Magnetization; Processes; Ultrathin; Epitaxial; Films

9531115 Zangwill The magnetic properties of ultra-thin ( 5 monolayers) films are likely to be strongly affected by the surface roughness. The step edges of a rough film are sites of reduced symmetry and the magnetic moments located at these sites must experience different exchange constants as well as different anisotropy fields. The principal objective in this grant is to develop a consistent theory of magnetic hysteresis that connects the structure and morphology of these materials to their coercivity and remanence The program calls for extensive numerical calculations augmented by analytic and numerical analysis of toy models and continuum equations suggested by the simulations. The calculations offer direct evaluation of various experimentally measurable quantities and thus afford comparison with the experiments. %%% Magnetic thin films are used in a variety of applications, the most well known being in memory devices. This grant is comprehensive program of theoretical research to study the magnetic properties of realistic thin films i.e. the program incorporates the structural and morphological effects (of surface roughness) in an essential way. ***

9531115 Zangwill 超薄（5 个单层）薄膜的磁性能可能会受到表面粗糙度的强烈影响。 粗糙薄膜的阶梯边缘是对称性降低的位置，位于这些位置的磁矩必须经历不同的交换常数以及不同的各向异性场。 这项资助的主要目标是开发一种一致的磁滞理论，将这些材料的结构和形态与其矫顽力和剩磁联系起来。该计划要求通过对玩具模型和模拟所建议的连续介质方程进行分析和数值分析来增强广泛的数值计算。这些计算提供了对各种实验可测量量的直接评估，从而可以与实验进行比较。 %%% 磁性薄膜有多种应用，其中最著名的是存储设备。 该资助是一项综合性的理论研究计划，旨在研究真实薄膜的磁性，即该计划以一种重要的方式结合了结构和形态效应（表面粗糙度）。 ***