AFTEREFFECT AND ACCOMMODATION ANISOTROPY IN METAL-PARTICLE AND METAL-EVAPORATED RECORDING MEDIA

Aftereffect and accommodation are measured in metal recording media us ing either evaporated cobalt (ME) or particulate iron (MP) as the magn etic material. These materials are highly anisotropic and measurements have been made parallel to the plane of the media both along the easy direction and along the hard direction. Along the easy direction, the Loops are square and there is only a smalt difference between the coe rcive field, H-c, and the remanent coercive field, H-ci. Along the har d direction the squareness is approximately one-half that along the ea sy axis and H-ci is shifted considerably from H-c.