Title :
Micromagnetic domain observations of Co-Cr films by neutron scattering
Author :
Takei, Koji ; Suzuki, Jun-ichi ; Maeda, Yasushi ; Morii, Yukio
Author_Institution :
NTT Basic Res. Labs., Atsugi, Japan
fDate :
11/1/1994 12:00:00 AM
Abstract :
Magnetic microstructures revealed by neutron small angle scattering are correlated with the compositional separation (CS) in sputtered Co-22at%Cr thin films for high density magnetic recording. The CS is confirmed to be strongest for deposition temperatures from 150°C to 400°C, using nuclear magnetic resonance. The finest magnetic particles, less than 10 nm in diameter, are detected in a film deposited at 200°C, in good agreement with the smallest features observed in the etched microstructure by transmission electron microscopy. This indicates that CS produces magnetic grains much smaller than the crystal grains which can, therefore, be applied to synthesize Co-Cr thin film media for ultra high density magnetic recording
Keywords :
chromium alloys; cobalt alloys; ferromagnetic materials; magnetic domains; magnetic particles; magnetic recording; magnetic thin films; nanostructured materials; neutron diffraction; nuclear magnetic resonance; sputtered coatings; transmission electron microscopy; 150 to 400 C; Co-Cr; compositional separation; crystal grains; etched microstructure; magnetic grains; magnetic microstructures; magnetic particles; micromagnetic domains; neutron small angle scattering; nuclear magnetic resonance; sputtered Co-Cr thin films; transmission electron microscopy; ultra high density magnetic recording; Etching; Magnetic films; Magnetic particles; Magnetic recording; Micromagnetics; Neutrons; Nuclear magnetic resonance; Particle scattering; Sputtering; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
