Magnetic viscosity in Nd-Fe-B sintered magnets

Magnetic viscosity in Nd-Fe-B sintered magnets was measured at different fields between 4.2 and 300 K. At a given temperature, the viscosity S( H) and the irreversible susceptibility χ irr are found to be proportional. The temperature dependence of the coefficient S v = S/ χ irr is deduced and an ex...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1987-07, Vol.67 (3), p.L281-L285
Main Authors: Givord, D., Lienard, A., Tenaud, P., Viadieu, T.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Magnetic properties and materials
Materials science
Metals, semimetals and alloys
Other topics in magnetic properties and materials
Physics
Specific materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Magnetic viscosity in Nd-Fe-B sintered magnets was measured at different fields between 4.2 and 300 K. At a given temperature, the viscosity S( H) and the irreversible susceptibility χ irr are found to be proportional. The temperature dependence of the coefficient S v = S/ χ irr is deduced and an expression for the activation energy is derived. It is found that the intrinsic activation energy E 0 is proportional to the domain wall energy, whilst the activation volume is proportional to the cube of the domain wall width.
ISSN:0304-8853
DOI:10.1016/0304-8853(87)90185-5