Title :
Measurement of magnetic viscosity in NdFeB
Author :
Crew, D.C. ; McCormick, P.G. ; Street, R.
Author_Institution :
Western Australia Univ., Nedlands, WA, Australia
fDate :
9/1/1996 12:00:00 AM
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 Hf) 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;
Journal_Title :
Magnetics, IEEE Transactions on
