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Values of the uniaxial anisotropy, cubic anisotropy, saturation magnetic induction, and saturation magnetostriction were obtained from measurements of the magnetization and magnetostriction of stress-annealed Galfenol (Fe<sub>100-x</sub>Ga<sub>x</sub>,x=12.5,18.4, and 22.0)and Fe<sub>81</sub>Al<sub>19</sub> as a function of compressive stresses &lt;100 MPa.(More)
the Naval Ordnance Laboratory Independent Research Fund. The authors are with the Naval Ordnance Laboratory, White Oak, Silver Spring, Md. 20910. ( E , Eo)/Eo. Since the modulus is directly related to the sound velocity, a large change in modulus with magnetization is potentially important, e.g., for variable acoustic delay lines, variable frequency(More)
Magnetomechanical properties (coupling factor, piezomagnetic d-constant, and permeability) were obtained as a function of both magnetic field (0 to 600 Oe) and applied stress (-200 MPa to +50 MPa) for Fe<sub>100-x</sub> Ga<sub>x</sub> (x=12.5, 18.4, and 22). To evaluate the coupling factors Y<sup>B</sup>, the Young's modulus at constant induction, was(More)
Prior studies using magnetic and magnetoelastic techniques have revealed a number of interesting properties in the Tbl.xDyxZn alloy series These include anomalies in the magnetizations and elastic moduli of polycrystalline samples with x 5 0 6, and a shifting and doubling of the maxima in magnetization of single crystal Tb0.5Dyo 5Zn as it was rotated in a(More)
Temperature dependent magnetoelastic properties of Fe <sub>100</sub> <sub>-</sub> <sub>x</sub>Ge<sub>x</sub>(5 &lt; x &lt; 18) single crystals have been measured. Tetragonal magnetostriction (3/2) lambda<sub>100</sub> measurements at <i>x</i> = 5.7, 12.1, 14.9, and 17.7 were performed between 78 K and 426 K and resonant ultrasound spectroscopy measurements(More)
Magnetomechanical coupling factor, piezomagnetic d-constant and magnetic permeability are reported as a function of magnetic field and applied stress for stress annealed Fe-Ga and Fe-Al alloys. Magnetic field dependences of the samples were measured as a function of the intrinsic saturation flux density (J<sub>s</sub>), lowest order cubic anisotropy(More)
In this paper (1) the development of a stress dependent tetragonal (uniaxial to lowest order) anisotropy in the Galfenol (iron-gallium) alloys by stress annealing is described (2) their magnetic, magnetostrictive and anisotropic properties by fitting magnetostriction and magnetoelastic data to a simple magnetization rotation model are given, and (3) the(More)