Title :
Magnetic and crystallographic characteristics of the order-disorder phase transformation in Pt1Co1
Author_Institution :
Wilkes Coll., Wilkes-Barre, PA, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
The atomic order-disorder transformation mechanism was examined in the Pt1Co1 magnetic binary alloy by magnetization and X-ray measurements. The results suggest that the ordering mechanism occurs in two stages. The initial, transient stage involves the transformation of the high-temperature, relatively strain free, disordered FCC (face-centered-cubic) lattice to a nonuniformly strained, disordered FCC lattice; the associated increase in the strain energy of the lattice is accompanied by a decrease in its magnetic energy. The highly strained regions then apparently serve as the nuclei for the second-stage transformation to the low-temperature, ordered, FCT (face-centered-tetragonal) structure
Keywords :
X-ray diffraction examination of materials; cobalt alloys; ferromagnetic properties of substances; magnetisation; order-disorder transformations; platinum alloys; PtCo magnetic alloy; X-ray measurements; crystallographic characteristics; disordered FCC lattice; ferromagnet; highly strained regions; magnetic energy; magnetization; order-disorder phase transformation; ordered FCT structure; strain energy; Atomic measurements; Crystallography; Kinetic theory; Lattices; Magnetic field induced strain; Magnetic field measurement; Saturation magnetization; Stability; Temperature; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
