Magnetomechanical behavior of rare earth iron-aluminum compounds

Conference · Mon Nov 01 04:00:00 EST 1993 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6837291

Prajapati, K; Jenner, A G; Greenough, R D ^[1]

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1. Univ. of Hull (United Kingdom). Dept. of Applied Physics

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 indicate that the magnetocrystalline anisotropy is reduced by the addition of Al to Terfenol-D, in keeping with the observed increase in low field permeability. 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 o] is due mainly to inhomogeneities and defects, rather than anisotropy.

• OSTI ID: 6837291
• Report Number(s): CONF-930416--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 29:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360104* -- Metals & Alloys-- Physical Properties
ACTUATORS
ALLOYS
ALUMINIUM
DATA
DYSPROSIUM ALLOYS
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
NUMERICAL DATA
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
STRAINS
TERBIUM ALLOYS
TRANSDUCERS