流体样本磁测量中的伪影。
Artifacts in magnetic measurements of fluid samples.
作者信息
Boekelheide Z, Dennis C L
机构信息
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Department of Physics, Lafayette College, Easton PA 18042, USA.
出版信息
AIP Adv. 2016 Aug;6(8). doi: 10.1063/1.4960457. Epub 2016 Aug 1.
Applications of magnetic fluids are ever increasing, as well as the corresponding need to be able to characterize these fluids . Commercial magnetometers are accurate and well-characterized for solid and powder samples, but their use with fluid samples is more limited. Here, we describe artifacts which can occur in magnetic measurements of fluid samples and their impact. The most critical problem in the measurement of fluid samples is the dynamic nature of the sample position and size/shape. Methods to reduce these artifacts are also discussed, such as removal of air bubbles and dynamic centering.
磁性流体的应用日益增加，同时对这些流体进行表征的需求也相应增加。商用磁力计对于固体和粉末样品而言准确且特征明确，但它们在流体样品中的应用则较为有限。在此，我们描述了在流体样品磁性测量中可能出现的伪像及其影响。流体样品测量中最关键的问题是样品位置以及尺寸/形状的动态特性。我们还讨论了减少这些伪像的方法，例如去除气泡和动态定心。
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