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- W2052435170 abstract "We describe the synthesis, magnetism, and structure of CoPtCrB alloys with Pt concentrations from 10%–43%. The Cr concentration in the alloys was 15%–17% and the B concentration was 9%–11%. The magnetic anisotropy and coercivity increase with increasing Pt up to ≈30%, plateau at ≈35 000 Oe and ≈6000 Oe, respectively, and then decrease. Transmission electron microscopy results show the media form fine isolated grains for all Pt concentrations. X-ray diffraction measurements show that with increasing Pt a face-centered-cubic (fcc) Co-alloy phase is progressively formed at the expense of the hexagonal-close-packed Co-alloy and that this fraction becomes significant for >35% Pt. The formation of the fcc phase likely causes the behavior in the anisotropy. No Pt concentration dependence is observed for the stacking fault density. The x-ray data show that with increasing Pt, the CoPtCrB-alloy lattice parameters exhibit two distinct regions with the slope changing at 16% Pt. The presence of these two regions is discussed." @default.
- W2052435170 created "2016-06-24" @default.
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- W2052435170 date "2003-08-29" @default.
- W2052435170 modified "2023-09-23" @default.
- W2052435170 title "High anisotropy CoPtCrB magnetic recording media" @default.
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- W2052435170 doi "https://doi.org/10.1063/1.1601689" @default.
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