Measurement of magnetic viscosity in NdFeB

Author

Crew, D.C. ; McCormick, P.G. ; Street, R.

Author_Institution

Western Australia Univ., Nedlands, WA, Australia

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4356

Lastpage

4358

Abstract

Magnetic viscosity has been investigated in four samples of melt-quenched and sintered NdFeB. The irreversible magnetization has been measured using two different techniques based on measurements of the DCD remanence curve and the reversible susceptibility. The difference in the value of λ (sometimes known as the fluctuation field H_f) measured by these two techniques has been related to a new parameter η which describes the dependence of reversible magnetization on irreversible magnetization. The behaviour of η for the melt-quenched and sintered samples is compared with the behaviour expected for an idealised Stoner-Wohlfarth system

Keywords

boron alloys; ferromagnetic materials; iron alloys; magnetic susceptibility; neodymium alloys; permanent magnets; remanence; DCD remanence curve; NdFeB; fluctuation field; idealised Stoner-Wohlfarth system; irreversible magnetization; magnetic viscosity; melt-quenched samples; reversible susceptibility; sintered samples; Demagnetization; Equations; Magnetic domains; Magnetic field measurement; Magnetic materials; Remanence; Saturation magnetization; Shape; Time measurement; Viscosity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538867

Filename

538867