Farrell Dorothy, Cheng Yuhang, McCallum R William, Sachan Madhur, Majetich Sara A
Physics Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213-3890, USA.
J Phys Chem B. 2005 Jul 21;109(28):13409-19. doi: 10.1021/jp050161v.
The magnetic properties of monodisperse Fe nanoparticles with over 4 orders of magnitude difference in concentration are studied by a combination of ordinary and remanent hysteresis loops, zero field cooled magnetization as a function of temperature, and magnetic relaxation rates. We compare the behavior of dilute dispersions with different concentrations, dispersions, and arrays made from the same particles, and nanoparticle arrays with different particle sizes and separations. The results are related to theoretical predictions and are used to create a unified picture of magnetostatic interactions within the assemblies.
通过结合常规磁滞回线和剩余磁滞回线、零场冷却磁化强度随温度的变化以及磁弛豫率，研究了浓度相差超过4个数量级的单分散铁纳米颗粒的磁性。我们比较了不同浓度的稀分散体、由相同颗粒制成的分散体和阵列，以及具有不同粒径和间距的纳米颗粒阵列之间的行为。结果与理论预测相关，并用于构建组件内静磁相互作用的统一图景。
