2003 Volume 44 Issue 8 Pages 1514-1517
Very small amount of B promotes the disorder/order transformation of L10 CoPt at low annealing temperature along with excellent c-axis orientation. The c-axis is slightly expanded by B atoms interstitially incorporated into the octahedral sites in the L10 CoPt lattice. Magnetic measurements using Hall magnetometry have revealed that the magnetic anisotropy energy (MAE) is enhanced by elongation of the c-axis. This result is in harmony with the first principles calculation which predicts that the c-axis elongation enhances the MAE of L10 CoPt due to the d band splitting of Co near the Fermi level in the minority spin state.
