Title :
Spin tilting phenomenon in strongly coupled AFC media
Author :
Tahk, Y.W. ; Lee, K.J. ; Lee, T.D.
Author_Institution :
Dept. of Mater. Sci. & Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
9/1/2002 12:00:00 AM
Abstract :
It has been reported that a new layered structure of antiferromagnetically coupled (AFC) media with high antiferromagnetic exchange constant J of 0.9 erg/cm2 can be achieved by insertion of Co layers. In such AFC media with high J value, a spin-tilting (or spin-flopping) phenomenon similar to that of the synthetic antiferromagnetic structure (SyAF) of the MR sensor can occur. The purpose of this work is to find relationships between the degree of spin-tilting and the recording characteristics such as SNR and thermal decay. Micromagnetic simulations have been performed for various thicknesses (t2) and magnetic properties of the bottom layer, since the spin-tilting can be directly related to them.
Keywords :
antiferromagnetic materials; cobalt; exchange interactions (electron); magnetic heads; magnetic multilayers; magnetic recording noise; spin dynamics; thermal stability; Co; Co layer insertion; MR sensor; Ru; Ru layer; SNR; antiferromagnetically coupled media; bottom layer; ferromagnetic layers; head field; high antiferromagnetic exchange constant; high-density magnetic recording; layered structure; magnetic properties; micromagnetic simulations; recording characteristics; spin tilting phenomenon; spin-flopping; strongly coupled AFC media; synthetic antiferromagnetic structure; thermal decay; thicknesses; Anisotropic magnetoresistance; Antiferromagnetic materials; Automatic frequency control; Couplings; Magnetic anisotropy; Magnetic recording; Magnetization; Materials science and technology; Micromagnetics; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801842
