EXPERIMENTAL VALIDATION OF THE PREISACH ACCOMMODATION PROPERTIES OF RECORDING MEDIA

The characterization of accommodation plays an important role in deter mining both the archival and the recording properties of magnetic reco rding materials. In this article the basic properties of the recently proposed accommodation paper were experimentally investigated on a com mercial flexible disk material. The new technique of operative field a ccommodation was used in our measurements. It was seen that the direct ion of the drift in remanence depends on the initial field reversal an d that the amount of accommodation depends not only on the width of th e minor loop, but the extrema values, as well. Although the amount of accommodation depends on the field reversal points, it was seen that f or any initial field reversal point, when cycling between the same ope rative field values, the stable minor loop is always the same. It was found that if \h(1)\=\h(2)\, that is, the accommodation process is sym metrical in the operative field, the stable minor loop is also symmetr ical. The amount of accommodation was found to be maximized for a proc ess in which \h(1)\=\h(2)\=h(i). The latter property could be utilized to accurately measure the accommodation parameter, beta. (C) 1997 Ame rican Institute of Physics.