Department of Mathematical Physics, Ural Federal University, 51 Lenin Avenue, 620000, Ekaterinburg, Russia.
J Phys Condens Matter. 2013 Apr 17;25(15):155102. doi: 10.1088/0953-8984/25/15/155102. Epub 2013 Mar 20.
We investigate the influence of dimensionality of a sample on the properties of magnetic dipolar soft spheres. Molecular dynamics simulations and diagram expansion are employed to analyze the pressure and microscopic structure of model monodisperse magnetic fluids in a bulk and in a monolayer. We found that, for a broad range of densities and dipolar interaction strengths, strong geometrical confinement weakens the influence of the dipole-dipole interaction on the pressure and, as a result, steric repulsion of dipolar particles provides the main contribution to the thermodynamic properties of ferrofluids in strong confinement.
我们研究了样品维度对磁偶极软球性质的影响。采用分子动力学模拟和图表展开的方法分析了模型单分散磁流体在体相和单层中的压力和微观结构。我们发现，对于很宽的密度和偶极相互作用强度范围，强几何约束减弱了偶极-偶极相互作用对压力的影响，结果，在强约束下，偶极粒子的位阻排斥对铁磁流体的热力学性质起主要贡献。
