Study of a chemical method of making low-coercivity channels for propagation of flat magnetic domains

Abstract

Static magnetic characteristics and film surface structure were studied in a chemical method of producing a hard magnetic layer around low coercivity channels. Applicability of the channels obtained was studied from the viewpoint of their ability to provide functionally stable propagation of flat magnetic domains. Probability of a false domain occurrence in propagation steps strongly depends upon the coercivity of the hard magnetic layer, magnetic properties, and shape of the low-coercivity channels and the parameters of the control fields, and may he well described by the exponential law in the area of small values for one transfer cycle per one bit (P1/1). Certain types of channels with certain values of hard magnetic layer coercivity and domain nucleation field have an area in which the value of the required erase field is practically independent of the propagation field. The study and computations show that the chemical method is capable of providing sufficiently low values of P1/1. The mechanism of false domain occurrence was not studied.