TY - JOUR
T1 - Effect of Naturally Adsorbed Gas on Substrate Surface on the Growth of Very Thin WCr Seedlayer
AU - Yoshimura, Satoru
AU - Djayaprawira, David D.
AU - Takakuwa, Yuji
AU - Takahashi, Migaku
N1 - Funding Information:
Manuscript received January 6, 2003. The work of S. Yoshimura was supported by the Japan Society for the Promotion of Science. S. Yoshimura and M. Takahashi are with the New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579, Japan (e-mail: syoshi@ecei.to-hoku.ac.jp; migaku@ecei.tohoku.ac.jp). D. D. Djayaprawira is with the Department of Electronic Engineering, To-hoku University, Sendai 980-8579, Japan (e-mail: david@ecei.tohoku.ac.jp). Y. Takakuwa is with the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan (e-mail: takakuwa@tagen.tohoku.ac.jp). Digital Object Identifier 10.1109/TMAG.2003.816268
PY - 2003/9
Y1 - 2003/9
N2 - The effect of naturally adsorbed gas on an NiP-Al substrate surface on the growth of a very thin WCr seedlayer and the effect of growth form of a WCr seedlayer on the microstructure and properties of magnetic recording media have been studied. An Auger electron spectroscopy analysis result clarifies that the critical thickness at which the WCr seedlayer changes from island-like to continuous layer is 2.5 and 1.5 nm when grown on the substrate surface with and without naturally adsorbed gas, respectively. The result means that the NiP-Al substrate surface with adsorbed gas enhances the island-like growth of the WCr seedlayer, probably due to the reduction of mobility of sputtered WCr particles when they react with the adsorbed gas on a substrate surface. It is found that the media grain size and the media noise are reduced only when using a WCr seedlayer thinner than 1.25 nm fabricated on substrate surface with adsorbed gas.
AB - The effect of naturally adsorbed gas on an NiP-Al substrate surface on the growth of a very thin WCr seedlayer and the effect of growth form of a WCr seedlayer on the microstructure and properties of magnetic recording media have been studied. An Auger electron spectroscopy analysis result clarifies that the critical thickness at which the WCr seedlayer changes from island-like to continuous layer is 2.5 and 1.5 nm when grown on the substrate surface with and without naturally adsorbed gas, respectively. The result means that the NiP-Al substrate surface with adsorbed gas enhances the island-like growth of the WCr seedlayer, probably due to the reduction of mobility of sputtered WCr particles when they react with the adsorbed gas on a substrate surface. It is found that the media grain size and the media noise are reduced only when using a WCr seedlayer thinner than 1.25 nm fabricated on substrate surface with adsorbed gas.
KW - Auger electron spectroscopy (AES)
KW - Initial growth style
KW - Naturally adsorbed gas
KW - Reflection high-energy electron diffraction (RHEED)
KW - Very thin WCr seedlayer
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U2 - 10.1109/TMAG.2003.816268
DO - 10.1109/TMAG.2003.816268
M3 - Article
AN - SCOPUS:0141885025
SN - 0018-9464
VL - 39
SP - 2270
EP - 2272
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 5 II
ER -