Document Type

Conference Proceeding

Conference

9th Joint MMM/Intermag Conference

Publication Date

6-1-2004

DOI

10.1063/1.1688676

City

Anaheim, CA

Abstract

Magnetostriction measurements from 77 K to room temperature on oriented (100) and (110) disk samples of Fe93.9Be6.1 and Fe88.7Be11.3 reveal substantial increases in λ100compared to iron. For the 11.3% alloy, λ100=110 ppm, a sixfold increase above that of α-Fe. For the 6.1% alloy, λ100=81 ppm, ∼40% and ∼170% greater than λ100 of comparable Fe–Ga and Fe–Al alloys, respectively, for H=15 kOe. Large differences exist between the values of λ100 and λ111 (λ100>0, λ111<0) and their temperature dependencies. Elastic constants, c11, c12, and c44, from 4 to 300 K were obtained on the same Fe–Be alloys. From these measurements, the magnetoelastic energy coefficients b1 and b2 were calculated. While the magnitudes of the magnetostrictions λ100 and λ111 are widely different, the magnitudes of b1 and b2 are within a factor of 2. The Fe–Be alloys are highly anisotropic magnetostrictively, elastically, and magnetoelastically. For Fe88.7Be11.3 at room temperature λ100/λ111, 2c44/(c11c12), and b1/b2 are −6.6, 3.55, and −1.86, respectively.

Comments

The following article appeared in Journal of Applied Physics 95 (2004): 6942 and may be found at http://dx.doi.org/10.1063/1.1688676.

Copyright Owner

American Institute of Physics

Language

en

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