By Topic

Ordering Transformation of FePt Thin Films by Initial Stress/Strain Control

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
$31 $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

6 Author(s)
Yuan, F.T. ; Dept. of Mater. Sci. & Eng., Feng Chia Univ., Taichung, Taiwan ; Liu, S.H. ; Liao, W.M. ; Hsiao, S.N.
more authors

The influence of initial stress/strain state on ordering of FePt is studied. The internal stress of FePt thin films deposited at room temperature can be successfully controlled in a wide range from compressive 0.95 GPa to 1.1 GPa tensile by adjusting sputter distance and inserting underlayer with different thickness. Ordering process is triggered by rapid thermal annealing at 350 for 15 min. Structural and magnetic results confirm that order transformation occurs within the stress range of . Highly stressed initial states (either compressive or tensile) suppress ordering in different ways. Large compressive stress increases the energy barrier of order reaction which results in volume expansion; strong tensile stress block the formation of phase by preventing the densification, a vital process prior to ordering, which creates intensive tensile stress. The results provide an insight into the ordering process in the aspect of evolution of internal stress/strain.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 3 )