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

FORC 图：表征天然样品磁性的新技术

• 批准号: 9909468
• 负责人: Kenneth Verosub
• 金额: $ 12.72万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-15 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909468&HistoricalAwards=false
• 关键词: FORC; Diagrams; New; Technique; Characterizing

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.

Verosub 9909468目前用于研究天然和合成材料的磁性的大多数方法仅提供关于磁性颗粒的平均尺寸的信息。研究人员正在开发一种新的方法，可以提供有关磁性颗粒尺寸分布的信息。 这些信息包含在等值线图（称为FORC图）中，这些等值线图由一组部分滞后曲线生成。初步结果表明，它是可以使用FORC图表征范围广泛的样品，并确定和区分具有相同的平均粒度的不同类型的组合。本项目的目标是：1）开发一种简单快速的方法来生成FORC图，以便该方法可以更广泛地使用，2）演示FORC图如何解决使用其他技术无法轻松解决的问题。