Interaction in double layered ME tapes

Abstract

A series of experimental double layered ME tapes with different oxygen concentrations were produced using an experimental mini-rollcoater setup. 6M measurements on these tapes indicate a negative (magnetostatic) interaction between the individual layers.

Intrinsic angular investigations on metal evaporated tapes

“…We attribute this to an aligning effect of the magnetisation direction in each layer caused by the stray field of the other layer. Immink et al [5] have also observed interactions between the layers of the same sample.…”

Experimental study of magnetic anisotropy in multilayered, metal-evaporated tapes

“…The multilayered structure was found to improve the magnetic properties, with an increase of the product M H c , and the recording performances, particularly at short recording wavelength. [2][3][4] In this work, the characteristics of the magnetic anisotropy in ME films, with two different compositions ͑Co-O and Co-Ni-O͒ and different numbers of layers, are studied. Because of the relatively complicated microstructure of the ME films, in which ferromagnetic grains with various sizes and shapes, Co-rich columns, and possible clusters of Co grains, coexist, the magnetic anisotropy field is not a single value and has a distribution.…”