Relations of slow relaxation of ferromagnets to saturating and recoiling fields

Systematic experiments on the Nd–Fe–B, Sm–Co, and Sr–Ferrite samples were performed to study the measuring-process dependent magnetic slow relaxation (magnetic viscosity). The relaxation coefficient (S) is proportional to the magnetic susceptibility (χ) for the Sr–Ferrite sample as the saturating fi...

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Bibliographic Details
Published in:Journal of applied physics 1999-04, Vol.85 (8), p.4536-4538
Main Author: Hsu, Shau-Wei
Format: Article
Language:English
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Summary:Systematic experiments on the Nd–Fe–B, Sm–Co, and Sr–Ferrite samples were performed to study the measuring-process dependent magnetic slow relaxation (magnetic viscosity). The relaxation coefficient (S) is proportional to the magnetic susceptibility (χ) for the Sr–Ferrite sample as the saturating field (Hs) and demagnetization field (Hd) are relatively large. The S–χ data for the Sm–Co sample are confined between two lines, which are related to the magnitudes of Hs and Hd. S is proportional to a specific magnetization difference (ΔM1) for the measurements along recoil curves. The proportional constants of the Nd–Fe–B sample are 0.163 and 0.171 for the applied field parallel and perpendicular to the c axis, respectively.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.370400