Characterisation of magnetostrictive materials with computer modelling

Author

Reed, I.M. ; Greenough, R.D. ; Schulze, M.P.

Author_Institution

Hull Univ., UK

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2386

Lastpage

2388

Abstract

A plane wave model (PWM) which enables magnetostriction parameters to be determined is fitted to simulated and experimental impedance curves, including an analysis of the inaccuracies due to random and systematic error. The PWM method is applied to a free standing rod of Terfenol-D. The magnetomechanical coupling coefficient, k₃₃, is found to have a maximum value of 0.509±0.002 at 25 kAM^-1. In comparison a resonance technique which only employs values for the resonance (f_R) and antiresonance (f_A) frequencies, with a correction for the skin effect, yields values for k₃₃ which are 15% larger. The difference is attributable to frequency dependent losses which influence not only f_R and f_A but the shape of the whole resonance curve

Keywords

dysprosium alloys; ferromagnetic properties of substances; iron alloys; magnetic leakage; magnetostriction; physics computing; skin effect; terbium alloys; PWM method; TbDyFe; Terfenol-D; antiresonance; computer modelling; free standing rod; frequency dependent losses; impedance curves; magnetomechanical coupling coefficient; magnetostrictive materials; plane wave model; resonance curve; resonance technique; skin effect; Analytical models; Computational modeling; Computer errors; Couplings; Impedance; Magnetic analysis; Magnetic materials; Magnetic resonance; Magnetostriction; Pulse width modulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281008

Filename

281008