论文标题
缺陷对磁滴成核的影响
The Effect of Defects on Magnetic Droplet Nucleation
论文作者
论文摘要
缺陷和杂质强烈影响在亚稳态捕获的热力学系统（重新）订购或无序过渡的时间和特征。在本文中，我们分析了二维磁系统的情况。我们适应了经典的JMAK理论，以说明缺陷对自由能屏障，关键液滴区域和相关亚稳定时间的影响。通过采用Glauber动力学进行的蒙特卡罗模拟，成功测试了所得的预测，以在不平衡转换期间获得可靠的时间依赖性结果。我们还专注于有限尺寸的效果，并研究了Spinodal线（将单链球与多垃圾制度分开）如何取决于系统大小，缺陷分数和外部场。
Defects and impurities strongly affect the timing and the character of the (re)ordering or disordering transitions of thermodynamic systems captured in metastable states. In this paper we analyze the case of two-dimensional magnetic systems. We adapt the classical JMAK theory to account for the effects of defects on the free energy barriers, the critical droplet area and the associated metastable time. The resulting predictions are successfully tested against the Monte-Carlo simulations performed by adopting Glauber dynamics, to obtain reliable time-dependent results during the out-of-equilibrium transformations. We also focus on finite-size effects, and study how the spinodal line (separating the singledroplet from the multi-droplet regime) depends on the system size, the defect fraction, and the external field.
