Reversal mechanisms in sintered Nd-Fe-B

The magnetic viscosity, and the reversible and irreversible susceptibilities of a sample of anisotropic sintered Nd-Fe-B have been measured starting from various initial magnetized states. It is shown that the heights of energy barriers preventing the reversal of the magnetization in the grains depe...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 1994-08, Vol.27 (8), p.1601-1604
Main Authors: Tomka, G J, Bissell, P R, O'Grady, K, Chantrell, R W
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Fe and its alloys
Magnetic aftereffects
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Metals. Metallurgy
Physics
Saturation moments and magnetic susceptibilities
Studies of specific magnetic materials
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Summary:The magnetic viscosity, and the reversible and irreversible susceptibilities of a sample of anisotropic sintered Nd-Fe-B have been measured starting from various initial magnetized states. It is shown that the heights of energy barriers preventing the reversal of the magnetization in the grains depend on the initial magnetic state of the material. The change in energy barrier distribution is accompanied by a change in the nature of the magnetization reversal process, which cannot be described solely in terms of simple model pinning mechanisms.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/27/8/003