The influence of a uniform magnetic field on the Soret coefficient of magnetic nanoparticles
The influence of a uniform magnetic field on the Soret coefficient of magnetic nanoparticles
复制标题
均匀磁场对磁性纳米粒子Soret系数的影响
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
S. Odenbach
中科院分区：
文献类型：
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作者：
T. Völker;S. Odenbach
研究了磁流体中磁性颗粒的Soret系数。基于零场测量的Soret系数是定量确定的理论模型，磁场对这个参数的影响将显示。结果表明，热扩散过程的强度与磁场强度有明显的关系，磁场方向与驱动温度梯度的关系也有很大的影响。特别是索雷系数的符号的变化，观察到如果磁场的取向平行于温度梯度。
Investigations were made to determine the Soret coefficient of magnetic particles in a ferrofluid. Based on zero field measurements from which the Soret coefficient is quantitatively determined with a theoretical model, the influence of a magnetic field on this parameter will be shown. A clear dependence of the intensity of the thermodiffusive process on the magnetic field strength could be found. In addition it could be shown, that the direction of the field relative to the driving temperature gradient has a significant influence too. In particular a change of the sign of the Soret coefficient was observed if the magnetic field is orientated parallel to the temperature gradient.