Effect of initial stress/strain state on formation of (001) preferred orientation in L1(0) FePt thin films
Resource
JOURNAL OF APPLIED PHYSICS, 109(7), 07A737
Journal
Journal of Applied Physics
Pages
07A737
Date Issued
2011
Date
2011
Author(s)
Mei, J.K.
Yuan, F.T.
Liao, W.M.
Yao, Y.D.
Lin, H.M.
Lee, H.Y.
Hsu, J.H.
Abstract
The stress state of FePt thin films deposited at room temperature was controlled within the range from 1.01 GPa compressive to 0.18 GPa tensile before taking rapid thermal annealing (RTA). After the order-disorder transformation triggered by RTA at temperatures (Ta) from 650 to 800 °C for 5 min, the tensile-stressed films exhibit significant preferred orientation of (001) of L10 structure. However, the compressive-strained ones show isotropic texture. Strong (001) texture with high Lotgering orientation factor of 0.9 is obtained at Ta 800 °C, resulting in enhanced perpendicular magnetic anisotropy. The results provide direct evidence of stress-induced (001) texture, which could be significant for future applications. © 2011 American Institute of Physics.
Type
journal article
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