Title :
Magnetoelastic behaviour of aluminium substituted Terfenol-D at elevated temperatures
Author :
Prajapati, K. ; Jenner, A.G. ; Greenough, R.D.
Author_Institution :
Dept. of Appl. Math., Hull Univ., UK
fDate :
11/1/1995 12:00:00 AM
Abstract :
Comparisons of the magnetoelastic responses of the highly magnetostrictive compound Terfenol-D (Tb0.3Dy0.7Fe 1.95) with aluminium substituted compounds Tb0.3Dy(Fe1-xAlx)1.95 where 0.05⩽×⩽0.10 in the temperature range 20-300°C have been made. In particular measurement of magnetostrictive strain (λ), differential strain coefficient (d33), and magnetomechanical coupling coefficient (k33) have been made against applied dc magnetic field (⩽120 kA/m), uniaxial pressure (120 MPa), and temperature. Compared with Terfenol-D, the substituted materials are less anisotropic with larger d-coefficients which require lower bias fields
Keywords :
aluminium alloys; dysprosium alloys; ferromagnetic materials; internal stresses; iron alloys; magnetoelastic effects; magnetostriction; terbium alloys; 20 to 300 degC; Al substituted Terfenol-D; Tb0.3Dy(Fe1-xAlx)1.95; Tb0.3Dy0.7(FeAl)1.95; applied DC magnetic field; bias fields; differential strain coefficient; elevated temperatures; highly magnetostrictive compound; magnetoelastic behaviour; magnetomechanical coupling coefficient; magnetostrictive strain; uniaxial pressure; Aluminum; Iron; Magnetic anisotropy; Magnetic field induced strain; Magnetic field measurement; Magnetostriction; Perpendicular magnetic anisotropy; Strain measurement; Temperature distribution; Uniaxial strain;
Journal_Title :
Magnetics, IEEE Transactions on
