Magnetomechanical behaviour of rare earth iron-aluminium compounds

The DC field and pressure dependencies of the magnetic induction (B) and magnetostrictive strain ( lambda ) have been measured at room temperature in Terfenol-D (Tb/sub 0.3/Dy/sub 0.7/Fe/sub 1.95/) and in the compound Tb/sub 0.3/Dy/sub 0.7/(Fe/sub 0.9/ Al/sub 0.1/)/sub 1.95/. From these data the sta...

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Bibliographic Details
Published in:IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1993-11, Vol.29 (6), p.3514-3516
Main Authors: Prajapati, K., Jenner, A.G., Greenough, R.D.
Format: Article
Language:English
Subjects:
360103 > Metals & Alloys-- Mechanical Properties
ACTUATORS
ALLOYS
ALUMINIUM
Anisotropic magnetoresistance
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Couplings
DATA
DYSPROSIUM ALLOYS
ELEMENTS
Exact sciences and technology
EXPERIMENTAL DATA
INFORMATION
Iron
IRON ALLOYS
IRON BASE ALLOYS
Magnetic anisotropy
Magnetic field induced strain
Magnetic field measurement
MAGNETIC PROPERTIES
Magnetic properties and materials
Magnetomechanical and magnetoelectric effects, magnetostriction
Magnetostriction
MATERIALS SCIENCE
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
Metals. Metallurgy
MICROSTRUCTURE
NUMERICAL DATA
Perpendicular magnetic anisotropy
PHYSICAL PROPERTIES
Physics
RARE EARTH ALLOYS 360104 > Metals & Alloys-- Physical Properties
Strain measurement
STRAINS
Temperature measurement
TERBIUM ALLOYS
TRANSDUCERS
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Summary:The DC field and pressure dependencies of the magnetic induction (B) and magnetostrictive strain ( lambda ) have been measured at room temperature in Terfenol-D (Tb/sub 0.3/Dy/sub 0.7/Fe/sub 1.95/) and in the compound Tb/sub 0.3/Dy/sub 0.7/(Fe/sub 0.9/ Al/sub 0.1/)/sub 1.95/. From these data the static differential permeability ( mu ) and strain coefficient (d/sub 33/=d lambda /dH) have been obtained. A comparison of their magnetostrictive responses indicates that the magnetocrystalline anisotropy is reduced by the addition of Al to Terfenol-D. A slight lowering of d/sub 33/ with Al content is attributed to a reduction in magnetoelastic coupling, also seen in a lower magnetomechanical coupling coefficient. The work done by either compound against the applied pressure for different isostatic fields has been calculated. From these curves the residual stress levels, T/sub 0/, are substantially lower than those reported previously in Tb/sub 0.27/Dy/sub 0.73/Fe/sub 2/, indicating that in the present compounds T/sub 0/ is due mainly to inhomogeneities and defects, rather than anisotropy.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.281214