Annealing study of the erasability of high energy tapes

Author

Lekawat, L. ; Spratt, G.W.D. ; Kryder, M.H.

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3628

Lastpage

3630

Abstract

The effects of high temperature long-term aging on the erasability of various high coercivity tape media were investigated. The results showed that Co-γ-Fe₂O₃ media, depending on how they were prepared, could become increasingly harder to erase, or stay virtually unchanged in their erasability after prolonged aging. For CrO₂ media, experiments indicated that aging the media at high temperatures could cause severe erosion, which badly degraded the media magnetic properties and recording performance, as well as altered the media erasure characteristics. Much less severe corrosion was observed for metal particle media. Aging the metal evaporated media at high temperatures caused their coercivity to increase, by as much as 30%, which was also reflected in the media erasure characteristics. Of all the media studied, Ba-ferrite was found to be the most stable against the annealing process

Keywords

ageing; annealing; barium compounds; chromium compounds; cobalt; coercive force; ferrites; magnetic properties of fine particles; magnetic recording; magnetic tapes; vapour deposited coatings; BaFe₁₂O₁₉; Co-Fe₂O₃; CrO₂; annealing process; corrosion; erasability; erosion; high coercivity tape media; high energy tapes; high temperature long term ageing effect; magnetic properties; media erasure characteristics; metal evaporated media; metal particle media; recording performance; Aging; Annealing; Coercive force; Corrosion; Magnetic field measurement; Magnetic properties; Magnetic recording; Magnetic separation; Saturation magnetization; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281251

Filename

281251