Flux loss in nanocomposite magnets

Author

Kanai, Yasuhisa ; Hayashida, Shin´ichi ; Fukunaga, Hirotoshi ; Yamashita, Fumitoshi

Author_Institution

Fac. of Eng., Nagasaki Univ., Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3292

Lastpage

3294

Abstract

The irreversible flux loss due to exposure to an elevated temperature was evaluated systematically for nanocomposite magnets with various coercivity values. It was found that the short-term and long-term flux losses in some nanocomposite magnets are smaller than in a conventional isotropic Nd-Fe-B magnet despite their small coercivity values. The origins of the observed small values for flux loss were studied by using the proposed model. It was clarified that the observed small values for the short-term flux loss in the nanocomposite magnets can be attributed to the squareness of a demagnetization curve of the nanocomposite magnets not deteriorating at an elevated temperature. The small values for the irreversible susceptibility of the nanocomposite magnets reasonably explained their small values for long-term flux loss

Keywords

Curie temperature; coercive force; demagnetisation; eddy current losses; magnetic aftereffect; magnetic flux; magnetic susceptibility; nanostructured materials; permanent magnets; demagnetization curve; flux loss; irreversible flux loss; irreversible susceptibility; nanocomposite magnets; short-term flux loss; squareness; Coercive force; Magnetic flux; Magnetic losses; Magnetic materials; Magnetic susceptibility; Magnetization; Magnets; Remanence; Stability; Temperature measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800502

Filename

800502