Giant magnetostriction materials from cryogenic temperatures to 250 C

Arthur E. Clark

doi:10.1117/12.51192

13 January 1992 Giant magnetostriction materials from cryogenic temperatures to 250° C

Arthur E. Clark

Proceedings Volume 1543, Active and Adaptive Optical Components; (1992) https://doi.org/10.1117/12.51192
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Huge magnetoelastic interactions in the rare earths Tb, Dy, and Sm provide the basis of a technically important class of magnetostrictive materials with saturation strains, 10-3 < (Delta) l/l < 10-2. Rare earth elements, oxides, intermetallic compounds, and rapidly quenched amorphous metals all exhibit large magnetostrictions. Of particular importance here are the binary hexagonal TbxDy1-x alloys, which produce extremely high magnetostrictions at cryogenic temperatures, and the pseudobinary cubic TbxDy1-xFe2 compounds, which exhibit huge strains at room temperature and above. For the highly magnetostrictive room temperature materials, specific features which dominate the magnetostrictive behavior are: (1) large magnetic moments (approximately equals 1 T), (2) large magnetostriction anisotropy, (lambda) 111 >> (lambda) 100, and (3) changes in the magnetic easy axes from <100> (low magnetostrictive) to <111> (giant magnetostrictive) with temperature. Magnetostrictions > 10-3 are found as high as 150 degree(s)C in Tb.27Dy.73Fe2 and 250 degree(s)C in TbFe2.

Citation Download Citation

Arthur E. Clark "Giant magnetostriction materials from cryogenic temperatures to 250° C", Proc. SPIE 1543, Active and Adaptive Optical Components, (13 January 1992); https://doi.org/10.1117/12.51192

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