Laser patterning assisted processing enabling magnetic domain engineering of soft magnetic alloys
AssigneeUniversity of Pittsburgh—Of the Commonwealth System of Higher Education
InventorsAhmed Talaat, Paul R. Ohodnicki, Tyler William Paplham
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Abstract
Disclosed herein are alloys comprising spatially optimized domain structures and microstructures of alloys. Also disclosed herein are methods for domain engineering, particularly in magnetic material, using either pulsed or continuous wave laser irradiation. Methods disclosed herein can be used to vary magnetic properties in a magnetic material, including but not limited to magnetic domain structure, hysteresis, and eddy currents.
Claims30
A method for creating an engineered domain structure of an initially amorphous ribbon, the method comprising:
- obtaining an amorphous ribbon, comprising:
- one or more transition metals;
- and
- one or more elements chosen from B, Al, Ga, C, Si, and Ge;
- exposing the amorphous ribbon to laser irradiation.
-7. (canceled)
The method as recited in claim 4, wherein:
- the amorphous ribbon has the empirical formula Fex2Six6Nbx7Bx8Cu;
- x2 is between 70 and 80;
- x6 is between 15 and 16;
- x7 is between 2.5 and 3.5;
- and
- x8 is between 6 and 8.
The method as recited in claim 5, wherein the amorphous material has the empirical formula Fe73-74Si15.4-15.6Nb2.9-3.1B6.8-7.2Cu1.
-13. (canceled)
A method for optimizing a property of a material comprising a nanocrystalline phase within an amorphous matrix, the method comprising:
- obtaining a material comprising:
- an amorphous matrix;
- and
- a nanocrystalline phase within the amorphous matrix;
- irradiating a portion of the material to form one or more irradiated spots, comprising
- exposing the material to laser irradiation;
- altering one or more domain structures inside the one or more irradiated spots;
- and
- optimizing a property of the material, the property selected from the group consisting of magnetism, phase identity of the nanocrystalline phase, volume fraction of the nanocrystalline phase, and grain size of the nanocrystalline phase.
-18. (canceled)
-31. (canceled)
-35. (canceled)
The method as recited in claim 11, wherein:
- the amorphous matrix has the empirical formula Fex2Six6Nbx7Bx8Cu;
- x2 is between 70 and 80;
- x6 is between 15 and 16;
- x7 is between 2.5 and 3.5;
- and
- x8 is between 6 and 8.
The method as recited in claim 12, wherein the amorphous matrix has the empirical formula Fe73-74Si15.4-15.6Nb2.9-3.1B6.8-7.2Cu1.
-41. (canceled)
The method as recited in claim 13, wherein the amorphous matrix has the empirical formula Fe73.5Si15.5Nb3B7Cu1.
A method for converting an initially fully- or partially-crystalline region in a surface layer of a material to an amorphous domain, the method comprising:
- obtaining a material comprising:
- a surface layer;
- and
- an initial fully- or partially-crystalline region in the surface layer;
- and
- irradiating a portion of the material to form an amorphous domain, comprising exposing the material to laser irradiation.
-45. (canceled)
-49. (canceled)
The method as recited in claim 17, wherein:
- the material has the empirical formula Fex2Six6Nbx7Bx8Cu;
- x2 is between 70 and 80;
- x6 is between 15 and 16;
- x7 is between 2.5 and 3.5;
- and
- x8 is between 6 and 8.
The method as recited in claim 18, wherein the amorphous matrix has the empirical formula Fe73-74Si15.4-15.6Nb2.9-3.1B6.8-7.2Cu1.
-55. (canceled)
-98. (canceled)
Dependencies are inferred from the claim text.