Title :
Effect of anisotropy field magnitude distribution on signal-to-noise ratio
Author :
Wei, Don ; Liu, Bo
Author_Institution :
Dept. of Mater. Sci. & Technol., Tsinghua Univ., Beijing, China
fDate :
9/1/1997 12:00:00 AM
Abstract :
Recording performance is analyzed by a micromagnetic model in two thin film media with different distribution width of the anisotropy field magnitude. With the same Mrδ, the magnetic properties of the two media are almost the same except that the switching slope S* is larger for the medium with narrower distribution. The signal-to-noise ratio (SNR) is calculated for both media versus recording densities. The SNR at recording densities 4800-9000 flux reversals per millimeter is 5-8 dB smaller in the medium with a broad anisotropy magnitude distribution than the SNR in the medium with a sharp distribution
Keywords :
magnetic anisotropy; magnetic recording noise; anisotropy field magnitude distribution; micromagnetic model; recording density; signal-to-noise ratio; switching slope; thin film medium; Anisotropic magnetoresistance; Disk recording; Magnetic analysis; Magnetic properties; Magnetic recording; Micromagnetics; Performance analysis; Signal analysis; Signal to noise ratio; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
