Leliaert Jonathan, Vansteenkiste Arne, Coene Annelies, Dupré Luc, Van Waeyenberge Bartel
Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000, Ghent, Belgium,
Med Biol Eng Comput. 2015 Apr;53(4):309-17. doi: 10.1007/s11517-014-1239-6. Epub 2015 Jan 1.
We present Vinamax, a simulation tool for nanoparticles that aims at simulating magnetization dynamics on very large timescales. To this end, each individual nanoparticle is approximated by a macrospin. Vinamax numerically solves the Landau-Lifshitz equation by adopting a dipole approximation method, while temperature effects can be taken into account with two stochastic methods. It describes the influence of demagnetizing and anisotropy fields on magnetic nanoparticles at finite temperatures in a space- and time-dependent externally applied field. Vinamax can be used in biomedical research where nanoparticle imaging techniques are under development, e.g., to validate other higher-level models and study their limitations.
我们介绍了Vinamax，这是一种用于纳米粒子的模拟工具，旨在模拟非常大时间尺度上的磁化动力学。为此，每个单独的纳米粒子都由一个宏观自旋近似。Vinamax通过采用偶极近似方法对朗道-里夫希茨方程进行数值求解，同时可以用两种随机方法考虑温度效应。它描述了在有限温度下，退磁场和各向异性场在空间和时间相关的外部施加场中对磁性纳米粒子的影响。Vinamax可用于正在开发纳米粒子成像技术的生物医学研究中，例如，用于验证其他高级模型并研究其局限性。
