Grain size effect of Ni–W–Cu seed layer film upon signal-to-noise ratio for PMR application

Kun Ming Chen; Yun Kai Cheng; Hao Chia Liao; In Gann Chen; Weng Sing Hwang

doi:10.1016/j.vacuum.2015.05.040

Grain size effect of Ni–W–Cu seed layer film upon signal-to-noise ratio for PMR application

Kun Ming Chen, Yun Kai Cheng, Hao Chia Liao, In Gann Chen, Weng Sing Hwang

Research output: Contribution to journal › Article › peer-review

Abstract

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 Ni_80−xW_xCu₂₀ (x = 8, 14, 20). In addition, the decayed crystallinity resulting from increasing x value was ameliorated by raising y in Ni_92−yW₈Cu_y (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).

Original language	English
Pages (from-to)	27-31
Number of pages	5
Journal	Vacuum
Volume	120
DOIs	https://doi.org/10.1016/j.vacuum.2015.05.040
Publication status	Published - 2015 Oct 1

All Science Journal Classification (ASJC) codes

Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films

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@article{39a1f1f4c8854821a8a590b481db3c5d,

title = "Grain size effect of Ni–W–Cu seed layer film upon signal-to-noise ratio for PMR application",

abstract = "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).",

author = "Chen, {Kun Ming} and Cheng, {Yun Kai} and Liao, {Hao Chia} and Chen, {In Gann} and Hwang, {Weng Sing}",

year = "2015",

month = oct,

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doi = "10.1016/j.vacuum.2015.05.040",

language = "English",

volume = "120",

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journal = "Vacuum",

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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

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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