Noise characteristics of interacting transitions in longitudinal thin film media

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Abstract
Spatial distribution and correlation of transition noise for closely recorded interacting transitions were characterized based on time domain noise measurements and analysis. Corresponding magnetization fluctuation of the transition profiles were obtained by a deconvolution method. It is found that at small bit intervals, correlated amplitude fluctuation of a dipulse, resulting from magnetization fluctuation of the regions in between the dibit transitions, represents the main noise characteristics of the interacting transitions. The study shows that in terms of noise properties, a tribit essentially behaves as two dibit transition pairs sharing the center transition and the amplitude variation is the main manifestation of the medium noise.