Local Energy Minimum Domain States in Magnetite, Titanomagnetite, and Hematite

9725844哈尔格达尔提出了一些实验，这些实验将在磁铁矿、钛磁铁矿和赤铁矿等具有古地磁意义的矿物中建立LEM域状态、剩磁和剩磁稳定性之间的联系。岩石磁学领域已经进入了一个充满活力的时代，磁域实验和理论正在关键领域汇聚。这种收敛的一个很好的例子是局部能量最小或LEM域态的存在。LEM磁区状态立即提出了一种新的机制，用于在细微磁性颗粒中获得剩磁和稳定性，例如那些在岩石中携带古地磁记录的颗粒。通过这种机制，剩磁不仅受缺陷处磁畴壁的钉扎控制，还受最终LEM态的物理演化控制。同样，磁稳定性将在很大程度上取决于转换到其他lem所需的能量。拟议的工作将解决这些影响之间的联系。***

9725844 Halgedahl The P.I. proposes experiments that would establish the links among LEM domain states, remanence, and remanent stability in paleomagnetically significant minerals such as magnetite, titanomagnetite, and hematite. The field of rock magnetism has entered an invigorating era in which magnetic domain experiments and theories are converging in key areas. An elegant example of this convergence is the existence of local energy minimum, or LEM, domain states. LEM domain states immediately suggest a new mechanism for remanence acquisition and stability in fine magnetic particles, such as those carrying the paleomagnetic record in rocks. By this mechanism, remanence would not just be controlled by the pinning of magnetic domain walls at defects, but also by the physical evolution of final LEM states. Likewise, magnetic stability would depend largely on the energies required for transitions to other LEMs. The proposed work will address the linages among these effects. ***