Influence of perpendicular external magnetic field on microstructures of monolayer composed of ferromagnetic particles: analysis by means of quasi-two-dimensional Monte Carlo simulation.
Influence of perpendicular external magnetic field on microstructures of monolayer composed of ferromagnetic particles: analysis by means of quasi-two-dimensional Monte Carlo simulation.
复制标题
垂直外磁场对铁磁颗粒单层微结构的影响：准二维蒙特卡罗模拟分析。
DOI：
10.1016/j.jcis.2008.04.017
复制
发表时间：
2008
影响因子：
9.9
通讯作者：
R. Chantrell
中科院分区：
文献类型：
--
作者：
M. Aoshima;A. Satoh;R. Chantrell
利用Monte Carlo模拟方法研究了磁场强度和粒子面密度对铁磁粒子组成的准二维单层膜微结构的影响。磁场是沿沿着垂直于单层平面的方向施加的。在模拟中得到的单分子膜的微观结构进行了分析的径向分布和取向分布函数。从粒子-粒子相互作用能的角度讨论了微结构的形成，并从模拟磁化曲线计算了单层的垂直磁化率。所得结果总结如下。对于小面密度的颗粒，由于颗粒中的磁矩沿着磁场方向的取向，通过颗粒之间的排斥磁性相互作用防止了链状结构的形成。对于中等面密度的颗粒，即使在施加相对较强的磁场时，链状结构仍然存在，因为吸引性磁相互作用的贡献增加。对于大面密度的颗粒，链状和局部有序结构的混合物出现由于在磁场的情况下的各向异性吸引磁相互作用。然而，当施加足够强的磁场时，颗粒之间的磁性相互作用变为各向同性排斥相互作用，这导致颗粒之间的短程排斥空间相互作用变得占主导地位，并出现六方密堆积结构。
We investigated the influences of the magnetic field strength and particle areal density on the microstructure of a quasi-two-dimensional monolayer composed of ferromagnetic particles by means of a Monte Carlo simulation. The magnetic field was applied along a direction perpendicular to the plane of the monolayer. Microstructures of the monolayer obtained in the simulations were analyzed in terms of radial distribution and orientational distribution functions. Formation of the microstructures is discussed from the perspective of particle–particle interaction energy and the perpendicular magnetic susceptibility of the monolayer was calculated from simulated magnetization curves. The obtained results are summarized as follows. For small areal density of particles, formation of chain-like structures is prevented by the repulsive magnetic interaction between particles due to orientations of the magnetic moments in the particles along the magnetic field direction. For intermediate areal density of particles, the chain-like structures remain even when a relatively strong magnetic field is applied, because contributions of the attractive magnetic interactions increase. For large areal density of particles, mixtures of chain-like and locally ordered structures appear due to the anisotropic attractive magnetic interactions in the absence of the magnetic field. However, when a sufficiently strong magnetic field is applied, the magnetic interactions between particles change to isotropic repulsive interactions, which results in the short-range repulsive steric interactions between particles becoming dominant with the appearance of hexagonal close packed structures.
影响因子：
2.7
作者：
Fujimori, Hiroyasu;Ohnuma, Shigehiro;Masumoto, Tsuyosi
通讯作者：
Masumoto, Tsuyosi
高磁场下弱磁性物质感应磁偶极子相互作用的实验与数值模拟
DOI：
--
发表时间：
2006
期刊：
Journal of Magnetism and Magnetic Materials (in print)
影响因子：
--
作者：
Y.Terui;T.Ando
通讯作者：
T.Ando
磁性纳米点阵列的电化学制造
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
T. Homma;A. Takami;M. Kunimoto
通讯作者：
M. Kunimoto