FORC Diagrams: A New Technique for Characterizing The Magnetic Properties of Natural Samples

Verosub 9909468目前用于研究天然和合成材料的磁性的大多数方法只提供关于磁性颗粒平均尺寸的信息。研究人员正在开发一种新方法，该方法将实际提供有关磁性颗粒尺寸分布的信息。这些信息包含在由一组部分滞后曲线生成的等高线图(称为Forc图)中。初步结果表明，可以使用Forc图表征大范围的样品，并识别和区分具有相同平均粒度的不同类型的组合。这个项目的目标是1)开发一种简单而快速的方法来生成力图，以便该方法能够得到更广泛的应用，以及2)演示力图如何能够解决使用其他技术不容易解决的问题。

Verosub 9909468 Most of the methods currently used for studying the magnetic properties of natural and synthetic materials only provide information about the average size of the magnetic grains. The investigators are developing a new method that will actually provide information about the size distribution of the magnetic grains. This information is contained in contour plots (called FORC diagrams) that are generated from a set of partial hysteresis curves. Preliminary results indicate that it is possible to characterize a wide range of samples using FORC diagrams and to identify and discriminate between the different types of assemblages that have the same average grain size. The goals of this project are 1) to develop a simple and rapid means of producing a FORC diagram so that the method can be more widely used, and 2) to demonstrate how FORC diagrams can solve problems that can not be easily solved using other techniques.