A Discussion of the Barbier Plot
Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
114
Journal Issue
3
Pages
L235-L236
Date Issued
1992
Author(s)
Klik, I.
Abstract
At room temperature the constant C in Barbier's relation lg[Sv|H=Hc]=-C+lg Hc, Sv is the magnetic viscosity parameter and Hc the coercivity, is approximately the same for a wide range of systems. We take into account the frequency dependence of Hc and derive an expression for C which is both system and measurement dependent. At low measurement frequencies and high temperatures, however, the system dependence of C is suppressed. A similar discussion is carried out for the activation volume v|Hc. © 1992.
Type
journal article