Phenomenology of domain wall pinning in ferromagnets and application to Fe-Ni Invar

A general framework, for the description of thermal activation of domain walls over pinning barriers in ferromagnets subjected to applied fields, is developed and used to evaluate the zero field quenched magnetization measured on warming, M ZFQ ↑, and the magnetic viscosity constant, S V, in various...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1989-02, Vol.78 (2), p.153-163
Main Author: Rancourt, D.G.
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
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Summary:A general framework, for the description of thermal activation of domain walls over pinning barriers in ferromagnets subjected to applied fields, is developed and used to evaluate the zero field quenched magnetization measured on warming, M ZFQ ↑, and the magnetic viscosity constant, S V, in various physical circumstances. Both a recently observed linear rise with temperature of M ZFQ ↑ and so-called “reentrant spin-glass” behaviour are elucidated. Particular attention is given to the special case of Fe-Ni Invar which is studied more fully in an accompanying paper.
ISSN:0304-8853
DOI:10.1016/0304-8853(89)90261-8