European intercomparison of measurements on permanent magnets

Author

Sievert, J. ; Ahlers, H. ; Lüdke, J. ; Siebert, S. ; Pareti, L. ; Solzi, M.

Author_Institution

Physikalisch-Tech. Bundesanstalt, Braunschweig, Germany

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2887

Lastpage

2889

Abstract

The results of a European intercomparison of measurements on permanent magnetic materials are reported. The intercomparison consists of two parts, i.e., measurements on cylindrical specimens of AlNiCo and NdFeB in a closed magnetic circuit; and measurements on spherical specimens of NdFeB in an open magnetic circuit using vibrating sample or SQUID magnetometers. Together with the other specimens, nickel reference specimens are circulated for calibration purposes. The results of the intercomparisons are complex, but in general the agreement obtained is quite good. A comparison of the two parts shows in H_c, H_cB and (BH)_max are considerable, which can be interpreted in the light of the aging of the NdFeB spherical specimens due to the preparation process

Keywords

aluminium alloys; boron alloys; calibration; cobalt alloys; ferromagnetic properties of substances; iron alloys; magnetic variables measurement; neodymium alloys; nickel alloys; permanent magnets; AlNiCo; NdFeB; SQUID magnetometers; aging; calibration; closed magnetic circuit; cylindrical specimens; measurements; open magnetic circuit; permanent magnets; reference specimens; spherical specimens; Calibration; Energy measurement; Laboratories; Magnetic circuits; Magnetic materials; Nickel; Permanent magnets; Polarization; Shape measurement; Vibration measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281086

Filename

281086