Title :
Lattice-matching consideration in pseudo-AFC structure
Author :
Chen, Shing-An ; Chang, Jack J K ; Lai, Chih-Huang
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Tsing-Hua Univ., Taiwan, Taiwan
Abstract :
Pseudo-antiferromagnetically coupled (AFC) structure media are fabricated by replacing the ferromagnetic layers adjacent to the Ru layer with nonferromagnetic layers in the AFC media. Lattice mismatching is manipulated by changing Ru to RuCo(Cr) alloys. The medium without Ru shows narrower PW50 and higher signal-to-noise ratio (SNR) than the pseudo-AFC medium with Ru. After replacing Ru with RuCo or RuCoCr, the PW50 and SNR are nearly constant when the thickness of Ru alloy is in the range of 0 to 8 Å. X-ray data show that better Co (11.0) texture is found in the pseudo-AFC media with Ru alloy layer than Ru layer. Transmission electron microscope images indicate that the Ru layer enlarges the grain and broaden its distribution.
Keywords :
X-ray diffraction; antiferromagnetic materials; chromium alloys; cobalt alloys; ferromagnetic materials; magnetic multilayers; magnetic recording; magnetic recording noise; ruthenium alloys; transmission electron microscopy; Ru layer; RuCo; RuCo(Cr); RuCo(Cr) alloys; ferromagnetic layers; lattice mismatching; lattice-matching consideration; nonferromagnetic layers; pseudo-AFC structure; pseudo-antiferromagnetically coupled structure media; signal-to-noise ratio; texture; transmission electron microscope images; Antiferromagnetic materials; Automatic frequency control; Cobalt alloys; Couplings; Lattices; Lifting equipment; Magnetic recording; Signal to noise ratio; Thermal stability; X-ray imaging;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816298
