By Topic

Microstructural evolution and thermal stability of thin CoCrTa/Cr films for longitudinal magnetic recording media

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
C. A. Ross ; Komag Inc., Milpitas, CA, USA ; F. M. Ross ; G. Bertero ; K. Tang

The microstructure and time-dependent magnetic properties of 2.8-60-nm-thick films of CoCrTa sputtered onto a Cr underlayer were measured. The thinnest films have a discontinuous microstructure with several CoCrTa nuclei forming on each Cr grain, with small angular misalignments from the exact epitaxial crystal orientation. For films of 10-nm thickness and above, the grains coalesce. There is evidence for stacking faults at all thicknesses although their appearance in atomic resolution micrographs changes with thickness. Magnetic switching volumes were measured from the change in coercivity with the scan rate of the external magnetic field. The ratio kV/kT of magnetic-to-thermal energy within the switching volume decreases as the film thickness decreases, and films thinner than 10 mn have kV/HT<60 and would show significant decay of recorded data if used in longitudinal media applications. The magnetic switching volumes are similar in magnitude but generally larger than the physical grain volume indicating magnetic interactions between the grains

Published in:

IEEE Transactions on Magnetics  (Volume:34 ,  Issue: 1 )