Richardi J, Pileni M P, Weis J-J
Laboratoire des Matériaux Mésoscopiques et Nanométriques, U.M.R. C.N.R.S. 7070, Université Pierre et Marie Curie (Paris VI), BP. 52, 4, place Jussieu, 75230 Paris Cedex 05, France.
J Chem Phys. 2009 Mar 28;130(12):124515. doi: 10.1063/1.3100304.
Monte Carlo simulations of a Stockmayer fluid confined between two parallel walls are performed to investigate self-organization of magnetic nanocrystals in a field parallel to the walls as a function of density, field strength, and wall separation. In order to study the formation of mesoscopic structures, a large number of up to 12,000 particles have to be used. The particles organize into periodically spaced cylindrical-like columns whose width typically varies between 5 and 9 particle diameters at low density. At small heights the columns are quenched due to the parallel walls, while larger wall separations can accommodate several layers of columns in good agreement with experiments. An increase in density entails a clear increase in column thickness, whereas an increase in field strength seems to have the opposite effect.
对限制在两个平行壁之间的斯托克迈耶流体进行了蒙特卡罗模拟，以研究平行于壁的磁场中磁性纳米晶体的自组织，作为密度、场强和壁间距的函数。为了研究介观结构的形成，必须使用大量多达12000个粒子。粒子组织成周期性间隔的圆柱状柱体，在低密度下其宽度通常在5到9个粒子直径之间变化。在小高度处，柱体由于平行壁而被淬灭，而较大的壁间距可以容纳几层柱体，这与实验结果吻合良好。密度的增加导致柱体厚度明显增加，而场强的增加似乎有相反的效果。
