Title :
Anti-ferromagnetic coupling effects on energy barrier and reversal properties of recording media
Author :
Wang, P. ; Shan, Z.S. ; Piramanayagam, S.N. ; Chong, T.C.
Author_Institution :
Dept. of Media & Mater., Nat. Univ. of Singapore, Singapore
fDate :
7/1/2001 12:00:00 AM
Abstract :
Analytical solutions for coercivity HCM1, HCM2 , effective (Mrt)eff, energy-barrier and effective thermal stability factor as a function of coupling constant J and other film parameters have been derived for two coupled ferromagnetic layers (FM-FM layer) with different magnetic properties for the first time. The condition for reduced effective (Mrt)eff is analyzed. These results are valuable for laminated antiferromagnetically coupled media design. This may open up a channel to raise thermal stability significantly while maintaining lower noise for longitudinal recording media
Keywords :
coercive force; exchange interactions (electron); magnetic multilayers; magnetic recording; magnetic switching; magnetisation reversal; thermal stability; antiferromagnetic coupling effects; coercivity; coupled ferromagnetic layers; coupling constant; effective thermal stability factor; energy barrier; laminated antiferromagnetically coupled media; longitudinal recording media; lower noise; magnetic recording media; magnetic switching; reversal properties; Antiferromagnetic materials; Coercive force; Couplings; Energy barrier; Magnetic analysis; Magnetic films; Magnetic properties; Stability analysis; Thermal factors; Thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
