Patent ID: 11862369
Assignee: HRL LABORATORIES, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  C  Y | IPC B  C  H

Claim 0:
1. A permanent-magnet structure comprising:
a region having a plurality of magnetic domains and a region-average magnetic axis, wherein each of said magnetic domains has a domain magnetic axis, wherein each said domain magnetic axis is substantially aligned with said region-average magnetic axis, and wherein said plurality of magnetic domains is characterized by an average magnetic domain size from 1 micron to 1000 microns; and
within said region, a plurality of metal-containing grains, wherein said plurality of metal-containing grains is characterized by an average grain size from 0.1 microns to 50 microns,
wherein said metal-containing grains contain a metal alloy selected from the group consisting of NdFeB, NdDyFeB, FeCoCr, FeAlNiCo, SmCo, Dy2O3, SrRuO3, Fe2O3, FeSi, FeNi, FeZn, MnZn, and combinations thereof,
wherein each of said magnetic domains has a domain easy axis that is dictated by a crystallographic texture of said metal-containing grains;
wherein said region has a region-average easy axis based on average value of said domain easy axis within said region; and
wherein said region-average magnetic axis and said region-average easy axis form a region-average alignment angle θ, wherein said region-average alignment angle θ is from −10° to 10°, and wherein said region-average alignment angle θ has a 0 standard deviation of less than 10° based on alignment-angle variance within said plurality of magnetic domains.