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AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsArthur E. Clark, Marilyn Wun-Fogle, James B. Restorff
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A method of using a magnetostrictive material to achieve a high magnetomechanical coupling factor comprising building an internal anisotropy energy into the magnetostrictive material and applying a tensile or compressive stress to the magnetostrictive material with the built-in internal anisotropy energy. The internal anisotropy energy is built into the magnetostrictive material by annealing the magnetostrictive material under an annealing stress or a suitable magnetic field. For a positive magnetostrictive material, when the annealing stress is compressive, the stress applied to the annealed material under operation is tensile, and when the annealing stress is the tensile, the stress applied to the annealed material under operation is compressive. For a negative magnetostrictive material, when the annealing stress is compressive, the stress applied to the annealed material under operation is tensile, and when the annealing stress is tensile, the stress applied to the annealed material under operation is compressive.
A method of using a magnetostrictive material having built-in anisotropy energy to achieve a high magnetomechanical transduction comprising:
A method of using a positive magnetostrictive material having built-in anisotropy energy by annealing the material under an annealing stress and/or annealing while applying a magnetic field to achieve a high magnetomechanical transduction comprising:
A method of using a negative magnetostrictive material having built-in anisotropy energy by annealing the material under an annealing stress and/or annealing while applying a magnetic field to achieve a high magnetomechanical transduction comprising:
Dependencies are inferred from the claim text.