On the measurement of magnetic viscosity
- 作者：C. Serletis ; K.G. Efthimiadis ; kge@auth.gr
- 关键词：Magnetic viscosity ; Experimental procedure ; Sr-hexaferrite
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2012
- 期刊代码：31_03048853
- 类别：ph
- 出版时间：August, 2012
- 卷：324
- 期：16
- 页码：2547-2552
- 文件大小：829 K
摘要
This work is an investigation of the experimental method used for measuring the magnetic viscosity in a hard ferromagnetic material, i.e. the recording of the magnetization under constant applied field and temperature, after the material has been magnetically saturated. It investigates how the experimental results are affected by the initial conditions of the method (saturation field, field change rate and field oscillation prior to its stabilization), and by minor variations of field and temperature during the recording. Based on the arising conclusions and the use of a more complex fitting function of measurements, the accuracy and repeatability of experimental results is improved.