Field dependence of magnetic viscosity of CoCrTa in-plane media
| Autor: | Th.J.A. Popma, Cock Lodder, Phan Le Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Materials science
SMI-EXP: EXPERIMENTAL TECHNIQUES Field (physics) Condensed matter physics Viscosity Time-dependence Field dependence Activation volume Coercivity Condensed Matter Physics SMI-TST: From 2006 in EWI-TST Analytical model Electronic Optical and Magnetic Materials Physics::Fluid Dynamics Condensed Matter::Materials Science In-plane media Distribution function Volume (thermodynamics) Remanence Thin film |
| Zdroj: | ISSUE=7;TITLE=7th International Conference of Magnetic Recording Media, MRM 1998 Journal of magnetism and magnetic materials, 193(1-3), 249-252. Elsevier |
| ISSN: | 0304-8853 |
| Popis: | In this paper we will present a study of magnetic viscosity as a function of applied field of CoCrTa/Cr in-plane media. The viscosity versus applied field curves (viscosity curves) of the samples exhibit a sharp peak at remanence coercivity (Hcr). Their activation volume was found to be close to the physical volume of the grains. The experimental viscosity curves are fitted to the simulated curves obtained by using an analytical model of Chantrell et al. [1]. Our simulation results give better understanding of the roles of the distribution function and the energy barrier in the formation of the viscosity curves. Based on the results, the relation between the peak position of the viscosity curves and the values of coercivity and remanence coercivity are explained. |
| Databáze: | OpenAIRE |
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