Digital record theory for a thin medium with easy magnetisation direction tilted out of its plane

A model is presented which enables the recording properties of media with arbitrary easy magnetisation directions to be studied. The slope theory of Williams and Comstock is extended to give a model using three parameters: the transition location, the transition width and the magnetisation in the medium. Results of simulations are presented as a function of the easy axis angle for fixed write current, and for mite current optimised at each easy axis angle. Isolated pulse waveforms and close-packed pulse outputs are predicted and show the general features observed including asymmetry when using media with tilted easy axes such as metal evaporated (ME) tape.