Title :
Particle distributions and noise in metal particle tapes
Author :
Aziz, Mustafa M. ; Middleton, Barry K. ; Miles, Jim J.
Author_Institution :
Sch. of Eng. & Comput. Sci., Exeter Univ., UK
fDate :
9/1/2002 12:00:00 AM
Abstract :
The magnetization spectrum from an erased (ac demagnetized or dc saturated) particulate medium was derived analytically using the autocorrelation function of a long line of separate and contiguous particles. The derived expressions indicated a strong dependence on the percentage of chains and their length inside the magnetic medium. Using the values of these quantities as fitting parameters, good agreement to measured noise spectra from a digital tape system was obtained.
Keywords :
demagnetisation; digital magnetic recording; magnetic hysteresis; magnetic particles; magnetic recording noise; magnetic tapes; particle size; ac demagnetized particulate medium; autocorrelation function; dc saturated particulate medium; digital tape system; erased particulate medium; hysteresis loop; magnetization power spectral density; magnetization spectrum; metal particle tapes; noise spectra; particle chains; particle distributions; particle size variations; separate contiguous particles; Atmospheric modeling; Autocorrelation; Demagnetization; Magnetic analysis; Magnetic noise; Magnetic separation; Noise measurement; Particle measurements; Pollution measurement; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802828
