Magnetic aftereffect of Nd-Fe-B sintered magnets

Author

Nishio, Hiroaki

Author_Institution

Toei Ind. Co. Ltd., Tokyo, Japan

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

3188

Lastpage

3192

Abstract

The magnetic field and temperature dependences of the magnetic aftereffect constant S_v were measured for Nd-Fe-B sintered magnets in the temperature range between 200 and 500 K on a J-H demagnetizing curve. It was found that S _v is constant and independent of the magnetic field in the range from H_m to H_cJ. S _v decreases linearly between 200 and 500 K as the temperature increases and is larger in materials whose H_cJ is large. The temperature dependence of S_v for Nd-Dy-Fe-B and Nd-Fe-Co-B sintered magnets differs from that in SmCo₅ magnets and is similar to that in Sm₂Co₁₇ sintered magnet. However, the value of S_v for Nd-Fe-Co-B sintered magnet is larger than that of Sm₂Co₁₇ magnets by roughly 2.5 to 3 times

Keywords

boron alloys; iron alloys; magnetic aftereffect; magnetic fields; neodymium alloys; permanent magnets; sintering; 200 to 500 K; J-H demagnetizing curve; Nd-Dy-Fe-B; Nd-Fe-Co-B; magnetic aftereffect; magnetic field; sintered magnets; temperature dependences; Demagnetization; Fluctuations; Frequency; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetization; Magnets; Temperature dependence; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92376

Filename

92376