Pseudo Single Domain Magnetization

伪单畴磁化

• 批准号: 9614138
• 负责人: Ronald Merrill
• 金额: $ 18.6万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-02-01 至 2002-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614138&HistoricalAwards=false
• 关键词: Pseudo; Single; Domain; Magnetization

96-14138 Merrill The PI proposes a theoretical study to determine the structures and energy minimum states for pseudo single domain (PSD) grains, in which stable magnetization in rocks typically resides. Preliminary analyses show that there are local energy minimum states even for the small grains exhibiting magnetic vortex structures, and that for a limited range of sizes and shapes, the global energy minimum state is that in which the magnetization is along the shortest dimension of the grain. This feature is contrary to what is expected and described widely in the community, and it has important ramifications for inclination anomalies, anisotropy, and for the origins of remanent magnetizations. ***

PI提出了一项理论研究，以确定岩石中稳定磁化的伪单畴（PSD）颗粒的结构和能量最小状态。初步分析表明，即使是具有磁旋涡结构的小晶粒也存在局部能量最小状态，并且在一定尺寸和形状范围内，全局能量最小状态是磁化沿晶粒的最小维分布。这一特征与学界的预期和广泛描述相反，它对倾角异常、各向异性和剩余磁化的起源具有重要影响。＊＊＊