Terbium-dysprosium-iron magnetostrictive materials and devices using these materials
AssigneeEnergen, Inc.
InventorsChiu-Ying Tai, Chandrashekhar Joshi
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Abstract
A terbium-dysprosium-iron magnetostrictive material of the type Tb1-xDyxFe2-y wherein x is less than 0.7, and y is less than or equal to 0.1, and devices using these materials.
Claims20
A terbium-dysprosium-iron magnetostrictive material of the formula Tb1-xDyxFe2-y wherein 0.22≦x≦0.7 and y is ≦0.1.
A terbium-dysprosium-iron magnetostrictive material of the formula Tb1-xDyxFe2-y wherein x is about 0.55 and y is from 0.05 to 0.1, and wherein at temperatures from below 250° K. to 293° K. the material exhibits a magnetostriction of at least about 1000 ppm and wherein the material exhibits a saturation magnetostriction of at least 2000 ppm at 4.2° K. and 77° K.
Dependencies are inferred from the claim text.