The nature of media recording noise in metallic, quasiparticulate thin films is principally related to the grain size, crystallographic orientation, and intergranular exchange and magnetostatic coupling in the films. In this study the results of a magnetic evaluation of magnetostatic interactions in CoNiCr thin films of varying Cr underlayer thickness are reported. The evaluation is undertaken through the measurement and comparison of remanence curves. The results presented here indicate enhanced cooperative switching as Cr underlayer thickness is reduced from 2000 to 100 Å, with a strong correlation between signal-to-noise measurements. In addition, the transition from principally exchange-coupled to quasiparticulate thin films, as Cr underlayer thickness increases, has been established.<lz> <lz> <lz> <lz> <lz> <lz>

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Articles you may be interested inReconstruction of a scanned topographic image distorted by the creep effect of a Z scanner in atomic force microscopy Rev. Sci. Instrum. 82, 053709 (2011); 10.1063/1.3590778 Bimodal magnetic force microscopy: Separation of short and long range forces Appl.

Abrtmct -In thh papa the effects of different demagnetisation procasu on intaactionr in thin fikn media have been examined.InterrCtion &ectr are examined using the now well established 6 1 tachnique. Tht study giver a better understanding to the nature of intaactionr in thin film media and in particular the effect of the initial magnetic state on the 61 technique.

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The surface of a thin-film disk can be patterned using standard lithographic techniques to form discrete tracks as narrow as 0.5 μm. These studies have been extended to patterns formed when an etched track is broken into discrete segments by etching away some portions of a discrete track. Abrupt changes in the magnetization can be obtained by dc erasing the medium, giving readback signals with ∼50% of the amplitude of conventional transitions when the gap of the readback head is aligned with the edge of the media pattern. The implications of these results for servo and read-only applications are discussed.