Wun-Fogle, M.; Restorff, J. B.; Lograsso, Thomas A.; and Petculescu, G., "Magnetostriction and elasticity of body centered cubic Fe100−xBex alloys" (2004). Abstract Magnetostriction measurements from 77 K to room temperature on oriented (100) and (110) disk samples of Fe 93.9 Be 6.1 and Fe 88.7 Be 11.3 reveal substantial increases in λ 100 compared to iron. For the 11.3% alloy, λ 100 =110 ppm, a sixfold increase above that of α-Fe. For the 6.1% alloy, λ 100 =81 ppm, ∼40% and ∼170% greater than

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... 100 of comparable Fe-Ga and Fe-Al alloys, respectively, for H=15 kOe. Large differences exist between the values of λ 100 and λ 111 (λ 100 >0, λ 111 <0) and their temperature dependencies. Elastic constants, c 11 , c 12 , and c 44 , from 4 to 300 K were obtained on the same Fe-Be alloys. From these measurements, the magnetoelastic energy coefficients b 1 and b 2 were calculated. While the magnitudes of the magnetostrictions λ 100 and λ 111 are widely different, the magnitudes of b 1 and b 2 are within a factor of 2. The Fe-Be alloys are highly anisotropic magnetostrictively, elastically, and magnetoelastically. For Fe 88.7 Be 11.3 at room temperature λ 100 /λ 111 , 2c 44 /(c 11 −c 12 ), and b 1 /b 2 are −6.6, 3.55, and −1.86, respectively. Keywords iron alloys, beryllium alloys, magnetostriction, magnetoelastic effects, elastic constants, magnetic anisotropy Disciplines Condensed Matter Physics | Metallurgy Comments The following article appeared in Journal of Applied Physics 95 (2004): 6942 and may be found at http://dx.