Title :
Epitaxial growth of quad-crystal Co-alloy magnetic recording media
Author :
Gong, Heng ; Yang, Wei ; Rao, Maithri ; Laughlin, David E. ; Lambeth, David N.
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
Abstract :
Quad-crystal CO-alloy/Cr/Ag thin film media were epitaxially grown on hydrofluric acid etched Si(111) single crystal substrates by sputter deposition. The orientation relationship was studied by x-ray θ/2θ diffraction and pole figure Φ-scan, and it was determined to be Co(1011) || Cr(ll0) || Ag(111) || Si(111). The Ag layer contains two twin-related orientations of grains. Cr grows with three variants of grains on the Ag(111) layer. Since Co(1011) contains grains with four possible easy axis directions when grown on each Cr variant, the quad-crystal media consist of grains with twelve easy axis directions and exhibit nearly isotropic in-plane magnetic properties.
Keywords :
X-ray diffraction; chromium; chromium alloys; cobalt alloys; ferromagnetic materials; magnetic epitaxial layers; magnetic recording; magnetic thin film devices; platinum alloys; silicon; silver; sputter deposition; vapour phase epitaxial growth; CoCrPt-Cr-Ag-Si; X-ray /spl theta//2/spl theta/ diffraction; easy axis directions; nearly isotropic in-plane magnetic properties; orientation relationship; pole figure /spl phi/-scan; quad-crystal magnetic recording media; single crystal substrates; sputter deposition; thin film media; twin-related grain orientations; Chromium; Cobalt alloys; Epitaxial growth; Lattices; Magnetic films; Magnetic properties; Magnetic recording; Sputtering; Substrates; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
