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Tunable anisotropy of co-based nanocomposites for magnetic field sensing and inductor applications

Patent ·
OSTI ID:1493319
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A method includes producing an amorphous precursor to a nanocomposite, the amorphous precursor comprising a material that is substantially without crystals not exceeding 20% volume fraction; performing devitrification of the amorphous precursor, wherein the devitrification comprises a process of crystallization; forming, based on the devitrification, the nanocomposite with nano-crystals that contains an induced magnetic anisotropy; tuning, based on one or more of composition, temperature, configuration, and magnitude of stress applied during annealing and modification, the magnetic anisotropy of the nanocomposite; and adjusting, based on the tuned magnetic anisotropy, a magnetic permeability of the nanocomposite.

Research Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Sponsoring Organization:
USDOE
DOE Contract Number:
AR0000219
Assignee:
Carnegie Mellon University (Pittsburgh, PA)
Patent Number(s):
10,168,392
Application Number:
14/278,836
OSTI ID:
1493319
Country of Publication:
United States
Language:
English

References (14)

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Nanocrystalline fluxgate cores with transverse anisotropy conference January 2004
Enhanced giant magnetoimpedance effect and field sensitivity in Co-coated soft ferromagnetic amorphous ribbons journal April 2011
Effect of thermomagnetic and thermomechanical treatments on the magnetic properties and structure of the nanocrystalline soft magnetic alloy Fe81Si6Nb3B9Cu1 journal March 2013
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Effect of stress and/or field annealing on the magnetic behavior of the (Co77Si13.5B9.5)90Fe7Nb3 amorphous alloy journal February 2005
Origin of the magnetic anisotropy induced by stress annealing in Fe-based nanocrystalline alloy journal April 2005
Magneto-impedance element journal July 1995
Magnetic domain refinement of silicon-steel laminations by laser scribing journal April 1996
Transmission electron microscopy study of large field induced anisotropy (Co1−xFex)89Zr7B4 nanocomposite ribbons with dilute Fe-contents journal February 2010
Recent advances in fluxgate magnetometry journal March 1972

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