Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3268471
Keywords
boron alloys; cobalt alloys; coercive force; copper alloys; Curie temperature; iron alloys; nanostructured materials; nickel alloys; soft magnetic materials; zirconium alloys
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Funding
- Office of Naval Research [N00014-09-WX-2-0658]
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We report on improved high-temperature soft magnetic properties in Fe(88-2x)Co(x)Ni(x)Zr(7)B(4)Cu(1) nanocrystalline alloys. Substituting 5.5 at. % Co and Ni for Fe enhances the magnetization by 5% at ambient temperature and by 30% at 650 degrees C. The Curie temperature of the residual amorphous phase is also raised significantly (from 67 degrees C for x=0 to 298 degrees C for x=5.5), resulting in low coercivities (< 30 A m(-1)) for Fe(77)Co(5.5)Ni(5.5)Zr(7)B(4)Cu(1) over the temperature range 50-500 degrees C. The higher magnetization and Curie temperature as compared with other Fe-based alloys, and smaller Co content as compared with (Fe,Co)-based alloys, make this alloy attractive as an affordable high-temperature soft magnetic material.
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