US-Mexico Cooperative Research: Theoretical Study of Surfaces and Magnetic Alloys

美墨合作研究：表面和磁性合金的理论研究

• 批准号: 8814613
• 负责人: Juan Sanchez
• 金额: $ 0.16万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1989-09-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814613&HistoricalAwards=false
• 关键词: US; Mexico; Cooperative; Research; Theoretical

This award will support Professor Juan Sanchez of Columbia University in a research collaboration with Professor Francisco Mejia-Lira of the Universidad Autonoma de San Luis Potosi, Mexico. The investigators plan to continue their previously established research collaboration in the following areas: phase equilibrium in magnetic alloys; surface phenomena in close-packed structures; ordering phenomena in superconducting ceramics; and thermodynamics of small metallic clusters. The main objective of the research is the characterization of the effects of magnetic interactions and of planar defects on alloy phase stability. To accomplish these objectives, several real and model alloy systems will be investigated using the cluster variation method of statistical mechanics from which free energies can be calculated. Because the techniques used by the researchers lie between strictly analytical techniques and very computer intensive techniques (Monte Carlo simulations) they are able to apply them to increasingly complex systems. Consequently, the proposed work has the potential for further application, particularly in the areas of magnetic recording where surface properties of magnetic materials are of critical importance.

这个奖项将支持哥伦比亚大学的胡安·桑切斯教授 与弗朗西斯科教授合作研究 墨西哥圣刘易斯波托西自治大学的Mejia-里拉。 调查人员计划继续他们先前建立的 在以下领域开展研究合作：相平衡 磁性合金;紧密堆积结构中的表面现象; 超导陶瓷中的有序现象和热力学 小金属簇的混合物 研究的主要目的是 磁相互作用的影响的表征和 平面缺陷对合金相稳定性的影响。 为了实现这些目标，几个真实的和模型合金， 系统将使用群集变分方法进行研究， 可以计算自由能的统计力学。 因为研究人员使用的技术严格介于 分析技术和非常计算机密集型的技术（蒙特 Carlo模拟），他们能够将其应用于越来越多的 复杂的系统 因此，拟议的工作具有潜力 对于进一步的应用，特别是在磁性领域， 磁性材料的表面特性 至关重要。