On the Use Complez Susceptibility Measurements in Investigating the Field Dependence of Resonance and After-effect Function of Nano-particle Colloids

摘要：

Measurement of the field and frequency dependent magnetic complex susceptibility, χ(ω,H)=χ(ω,H)-iχ(ω,H), of nano-particle colloids, such as magnetic fluids, has proven to be a reliable method for investigating a number of important properties of such fluids including ferromagnetic resonance, relaxation mechanisms and other important parameters. Also, because of the inverse Fourier transform relationship which exists between the after-effect function, b(t), and χ(ω), b(t) may be obtainedgnd used in determining a value of the precessional decay time, τ0.Here, examples of results obtained from measurements obtained by means of the transmission line technique in the MHz-GHz range, are presented.

作者: P.C.Fannin

作者单位: Department of Electronic and Electrical Engineering,Trinity College,Dublin 2,Ireland

会议类型: 国际会议

会议名称: Progress in Electromagnetics Research Symposium 2009(2009年电磁学研究新进展学术研讨会)(PIERS 2009)

会议地点: 北京

会议语种:英文

页码: 1348-1351

在线出版日期: 2009-03-23（万方平台首次上网日期，不代表论文的发表时间）