Stacking Faults in Co-Alloy Longitudinal Media
نویسندگان
چکیده
Stacking faults in CoCrTa/Cr, CoCrPt/NiAl, and CoCrPt/Cr/NiAl films have been studied by electron diffraction. Interfacial lattice match and epitaxial growth play important roles in reducing the stacking fault density. It is found that the bicrystal media has large stacking fault densities. In the unicrystal media case, when good epitaxy between magnetic layer and underlayer cannot be achieved, there are many randomly oriented grains in the magnetic layer. These random grains have a high stacking fault density.
منابع مشابه
Stacking Faults and Their Effect on Magnetocrystalline Anisotropy in Co and Co-Alloy Thin Films
Stacking faults in (1010) unicrystal Co and Co-alloy thin films have been analyzed by the electron diffraction technique. As predicted no diffraction contrast of stacking faults could be observed when the beam is parallel to the [1010] direction. However, both by plan-view TEM observation and electron diffraction along the [1120] direction reveal that the stacking fault density in biased pure C...
متن کاملMicrostructures of Long-Period Stacking Ordered Phase of MgZnY Alloy
The microstructures of ¡-Mg, long-period stacking ordered (LPSO) phases, and kink bands in a MgYZn alloy were observed by transmission electron microscopy (TEM). The results showed that extruded Mg97Zn1Y2 alloy included different kinds of phases: 2H-Mg, 2H-Mg with many stacking faults, 14H and 18R. Kink bands tended to occur in areas where there were many intermetallic compounds. The element ...
متن کاملEffects of stacking faults on magnetic viscosity in thin film magnetic recording media
There is much interest in crystallographic defects in thin film magnetic recording media and their role in influencing recording performance such as media noise and thermal loss. In this article we report a correlation between the magnetic viscosity in CoPtCr thin film media, which is the origin of thermal loss effects, and the concentration of local fcc-like regions. The concentration of these...
متن کاملNucleation of stress-induced martensites in a Ti/Mo-based alloy
The formation of stress-induced α′′ martensite in a metastable β Ti-Mo-based alloy has been studied using X-ray diffraction and transmission electron microscopy. The martensite nucleates heterogeneously at pre-existing sub-grain boundaries by dissociation of the boundary dislocations which bow out on inclined planes. The growth of martensite laths from the resultant stacking faults occurs by th...
متن کاملEffect of LPSO and SFs on microstructure evolution and mechanical properties of Mg-Gd-Y-Zn-Zr alloy
High performance Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr alloy with high strength and excellent ductility has been successfully developed by hot extrusion. The effect of plate-shaped long period stacking ordered (LPSO) phases and solute-segregated stacking faults (SFs) on the dynamically recrystallization (DRX) behavior was analyzed. The plate-shaped LPSO phases stimulate the DRX by particle stimulated nucle...
متن کامل