TY - JOUR
T1 - Grain size effect of Ni–W–Cu seed layer film upon signal-to-noise ratio for PMR application
AU - Chen, Kun Ming
AU - Cheng, Yun Kai
AU - Liao, Hao Chia
AU - Chen, In Gann
AU - Hwang, Weng Sing
N1 - Funding Information:
The authors acknowledge the Solar Applied Materials Technology Corp. , Taiwan for financial support of this research. A part of the present work was also supported by the Research Center for Energy Technology and Strategy (D104-23002), National Cheng Kung University in Taiwan.
Publisher Copyright:
© 2015 Elsevier Ltd
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - This study investigated the effects of W and Cu on the microstructure of Ni–W–Cu films which are used as the seed layer in perpendicular magnetic recording (PMR) media. Attributed to the relatively large radius of W, (i) the lattice mismatch between the seed layer and the intermediate layer in PMR, and (ii) the grain refining were successfully improved, in the presence of x increased in Ni80−xWxCu20 (x = 8, 14, 20). In addition, the decayed crystallinity resulting from increasing x value was ameliorated by raising y in Ni92−yW8Cuy (y = 0, 10, 20). It is believed that the reduced grain size and the enhanced crystallinity are beneficial to signal-to-noise ratio (SNR) in PMR media. Furthermore, both the adhesion and the sputtering-arcing tests passed the industrial standards. All the results were supported by glancing incident X-ray diffraction (GIXRD), transmission electron microscopy (TEM), and spatial energy dispersive spectroscopy (EDS).
AB - This study investigated the effects of W and Cu on the microstructure of Ni–W–Cu films which are used as the seed layer in perpendicular magnetic recording (PMR) media. Attributed to the relatively large radius of W, (i) the lattice mismatch between the seed layer and the intermediate layer in PMR, and (ii) the grain refining were successfully improved, in the presence of x increased in Ni80−xWxCu20 (x = 8, 14, 20). In addition, the decayed crystallinity resulting from increasing x value was ameliorated by raising y in Ni92−yW8Cuy (y = 0, 10, 20). It is believed that the reduced grain size and the enhanced crystallinity are beneficial to signal-to-noise ratio (SNR) in PMR media. Furthermore, both the adhesion and the sputtering-arcing tests passed the industrial standards. All the results were supported by glancing incident X-ray diffraction (GIXRD), transmission electron microscopy (TEM), and spatial energy dispersive spectroscopy (EDS).
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U2 - 10.1016/j.vacuum.2015.05.040
DO - 10.1016/j.vacuum.2015.05.040
M3 - Article
AN - SCOPUS:84983372817
VL - 120
SP - 27
EP - 31
JO - Vacuum
JF - Vacuum
SN - 0042-207X
ER -