Computational Studies of Dynamical Phenomena in Nanoscale Ferromagnets

近年来，材料的科学理解和技术应用取得了革命性的进展，这些材料的功能来源于纳米大小的颗粒和/或由一个或几个原子单层组成的超薄薄膜。人们现在可以在原子水平上设计材料，用纳米分辨率的显微镜研究单个粒子的结构和动力学。这些令人兴奋的实验和技术发展与新颖的计算算法和计算机体系结构相匹配，使得在这些材料的理论模型中对动态效应进行数值研究成为可能。智力奖励：该奖项将支持理论和计算研究，以进一步开发纳米级铁磁体模型中迟滞和热驱动磁化反转的新型仿真算法。该研究将提高对实际纳米级铁磁材料在大时间尺度上非零温度下的动力学现象的理解。更广泛的影响：将提高对真实纳米级磁性材料的磁化开关和磁滞动力学的基本理解。这将在未来的超高密度磁记录介质和磁随机存储器中阐明材料结构和动力学之间的关系，同时阐明数据完整性和读写速度。各个层次的学生都将参与这个项目。近年来，在科学理解和技术应用方面取得了革命性的进展，这些材料的功能来源于纳米大小的颗粒和/或由一个或几个原子单层组成的超薄薄膜。人们现在可以在原子水平上设计材料，用纳米分辨率的显微镜研究单个粒子的结构和动力学。这些令人兴奋的实验和技术发展与新颖的计算算法和计算机体系结构相匹配，使得在这些材料的理论模型中对动态效应进行数值研究成为可能。智力奖励：该奖项将支持理论和计算研究，以进一步开发纳米级铁磁体模型中迟滞和热驱动磁化反转的新型仿真算法。该研究将提高对实际纳米级铁磁材料在大时间尺度上非零温度下的动力学现象的理解。更广泛的影响：将提高对真实纳米级磁性材料的磁化开关和磁滞动力学的基本理解。这将在未来的超高密度磁记录介质和磁随机存储器中阐明材料结构和动力学之间的关系，同时阐明数据完整性和读写速度。各个层次的学生都将参与这个项目

In recent years, revolutionary progress has occurred in the scientific understanding and technological applications of materials that derive their functionality from nanometer-sized particles and/or ultrathin films of one or a few atomic monolayers. One can now engineer materials at the atomic level and study the structure and dynamics of individual particles with nanometer resolution microscopies. These exciting experimental and technological developments are matched by novel computational algorithms and computer architectures that make it possible to numerically study dynamic effects in theoretical models of such materials.Intellectual Merit: This award will support theoretical and computational research to further develop novel simulation algorithms for hysteresis and thermally driven magnetization reversal in models of nanoscale ferromagnets. The research will improve the understanding of dynamical phenomena in real nanoscale ferromagnetic materials at nonzero temperature over a large range of time scales. Broader Impact: Improved basic understanding of the dynamics of magnetization switching and hysteresis in real nanoscale magnetic materials will result. This will clarify the relations between materials structure and dynamics and, at the same time, data integrity and read/write speed in future ultra-high density magnetic recording media and magnetic random access memories. Students at all levels will be involved with this project.%%%In recent years, revolutionary progress has occurred in the scientific understanding and technological applications of materials that derive their functionality from nanometer-sized particles and/or ultrathin films of one or a few atomic monolayers. One can now engineer materials at the atomic level and study the structure and dynamics of individual particles with nanometer resolution microscopies. These exciting experimental and technological developments are matched by novel computational algorithms and computer architectures that make it possible to numerically study dynamic effects in theoretical models of such materials.Intellectual Merit: This award will support theoretical and computational research to further develop novel simulation algorithms for hysteresis and thermally driven magnetization reversal in models of nanoscale ferromagnets. The research will improve the understanding of dynamical phenomena in real nanoscale ferromagnetic materials at nonzero temperature over a large range of time scales. Broader Impact: Improved basic understanding of the dynamics of magnetization switching and hysteresis in real nanoscale magnetic materials will result. This will clarify the relations between materials structure and dynamics and, at the same time, data integrity and read/write speed in future ultra-high density magnetic recording media and magnetic random access memories. Students at all levels will be involved with this project.***