Iron-Nitride Thin Films Prepared by Arc-Discharge-Type Ion-Plating

Abstract
Ferromagnetic iron-nitride thin films were studied as part of a programme of research into recording media. Samples were prepared by using a new type of ion-plating called “arc-discharge-type ion-plating”. In order to ionize metal vapor and nitrogen gas effectively, a new ionization electrode was introduced between 2×10-4 and 2×10-3 Torr. Nitrized films were obtained when the films were prepared above 2×10-4 Torr. The composition of the films was analyzed using Mössbauer spectroscopy, and it was confirmed that the films were highly corrosion-resistant.