Structural control of electroless-plated magnetic recording media by underlayers

H. Matsubara, M. Toda, T. Sakuma, Takayuki Homma, Tetsuya Osaka, Y. Yamazaki, T. Namikawa

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The structural control of electroless-plated CoP film was investigated using underlayers of electroless-plated CoNiMnP and CoNiP films. The CoNiMnP film showed a high degree of orientation of the hcp Co c-axis normal to the film plane, whereas the CoNiP film hardly showed any preferred orientation. The CoP film plated onto the CoNiMnP underlayer showed a high degree of preferred orientation, while the CoP film plated onto the CoNiP underlayer showed a low degree of preferred orientation. Thus, the microstructure of the CoP film is clearly influenced by the underlayer structure. In the case of the CoP film onto the CoNiMnP underlayer, an epitaxial-like growth was observed up to a thickness of 0.25 μm, and this reduced to the intrinsic microstructure at a thickness of 0.5 μm. Recording characteristics were measured on the 5 in. flexible disks, fabricated by plating the high-oriented CoP film or the low-oriented CoP film with a ring-type head of a commercial VHS video head. Perpendicular recording was performed on the high-oriented CoP film to demonstrate the best characteristics. The use of an oriented underlayer is thus confirmed to be a useful method of controlling the structure of the magnetic film in addition to controlling the bath plating parameters.

Original languageEnglish
Pages (from-to)753-756
Number of pages4
JournalJournal of the Electrochemical Society
Volume136
Issue number3
Publication statusPublished - 1989 Mar

Fingerprint

Magnetic recording
magnetic recording
plating
Plating
recording
Magnetic films
microstructure
Microstructure
magnetic films
baths

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Matsubara, H., Toda, M., Sakuma, T., Homma, T., Osaka, T., Yamazaki, Y., & Namikawa, T. (1989). Structural control of electroless-plated magnetic recording media by underlayers. Journal of the Electrochemical Society, 136(3), 753-756.

Structural control of electroless-plated magnetic recording media by underlayers. / Matsubara, H.; Toda, M.; Sakuma, T.; Homma, Takayuki; Osaka, Tetsuya; Yamazaki, Y.; Namikawa, T.

In: Journal of the Electrochemical Society, Vol. 136, No. 3, 03.1989, p. 753-756.

Research output: Contribution to journalArticle

Matsubara, H, Toda, M, Sakuma, T, Homma, T, Osaka, T, Yamazaki, Y & Namikawa, T 1989, 'Structural control of electroless-plated magnetic recording media by underlayers', Journal of the Electrochemical Society, vol. 136, no. 3, pp. 753-756.
Matsubara, H. ; Toda, M. ; Sakuma, T. ; Homma, Takayuki ; Osaka, Tetsuya ; Yamazaki, Y. ; Namikawa, T. / Structural control of electroless-plated magnetic recording media by underlayers. In: Journal of the Electrochemical Society. 1989 ; Vol. 136, No. 3. pp. 753-756.
@article{c712ed9945ce485bbc4a0fca90f1f4da,
title = "Structural control of electroless-plated magnetic recording media by underlayers",
abstract = "The structural control of electroless-plated CoP film was investigated using underlayers of electroless-plated CoNiMnP and CoNiP films. The CoNiMnP film showed a high degree of orientation of the hcp Co c-axis normal to the film plane, whereas the CoNiP film hardly showed any preferred orientation. The CoP film plated onto the CoNiMnP underlayer showed a high degree of preferred orientation, while the CoP film plated onto the CoNiP underlayer showed a low degree of preferred orientation. Thus, the microstructure of the CoP film is clearly influenced by the underlayer structure. In the case of the CoP film onto the CoNiMnP underlayer, an epitaxial-like growth was observed up to a thickness of 0.25 μm, and this reduced to the intrinsic microstructure at a thickness of 0.5 μm. Recording characteristics were measured on the 5 in. flexible disks, fabricated by plating the high-oriented CoP film or the low-oriented CoP film with a ring-type head of a commercial VHS video head. Perpendicular recording was performed on the high-oriented CoP film to demonstrate the best characteristics. The use of an oriented underlayer is thus confirmed to be a useful method of controlling the structure of the magnetic film in addition to controlling the bath plating parameters.",
author = "H. Matsubara and M. Toda and T. Sakuma and Takayuki Homma and Tetsuya Osaka and Y. Yamazaki and T. Namikawa",
year = "1989",
month = "3",
language = "English",
volume = "136",
pages = "753--756",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "3",

}

TY - JOUR

T1 - Structural control of electroless-plated magnetic recording media by underlayers

AU - Matsubara, H.

AU - Toda, M.

AU - Sakuma, T.

AU - Homma, Takayuki

AU - Osaka, Tetsuya

AU - Yamazaki, Y.

AU - Namikawa, T.

PY - 1989/3

Y1 - 1989/3

N2 - The structural control of electroless-plated CoP film was investigated using underlayers of electroless-plated CoNiMnP and CoNiP films. The CoNiMnP film showed a high degree of orientation of the hcp Co c-axis normal to the film plane, whereas the CoNiP film hardly showed any preferred orientation. The CoP film plated onto the CoNiMnP underlayer showed a high degree of preferred orientation, while the CoP film plated onto the CoNiP underlayer showed a low degree of preferred orientation. Thus, the microstructure of the CoP film is clearly influenced by the underlayer structure. In the case of the CoP film onto the CoNiMnP underlayer, an epitaxial-like growth was observed up to a thickness of 0.25 μm, and this reduced to the intrinsic microstructure at a thickness of 0.5 μm. Recording characteristics were measured on the 5 in. flexible disks, fabricated by plating the high-oriented CoP film or the low-oriented CoP film with a ring-type head of a commercial VHS video head. Perpendicular recording was performed on the high-oriented CoP film to demonstrate the best characteristics. The use of an oriented underlayer is thus confirmed to be a useful method of controlling the structure of the magnetic film in addition to controlling the bath plating parameters.

AB - The structural control of electroless-plated CoP film was investigated using underlayers of electroless-plated CoNiMnP and CoNiP films. The CoNiMnP film showed a high degree of orientation of the hcp Co c-axis normal to the film plane, whereas the CoNiP film hardly showed any preferred orientation. The CoP film plated onto the CoNiMnP underlayer showed a high degree of preferred orientation, while the CoP film plated onto the CoNiP underlayer showed a low degree of preferred orientation. Thus, the microstructure of the CoP film is clearly influenced by the underlayer structure. In the case of the CoP film onto the CoNiMnP underlayer, an epitaxial-like growth was observed up to a thickness of 0.25 μm, and this reduced to the intrinsic microstructure at a thickness of 0.5 μm. Recording characteristics were measured on the 5 in. flexible disks, fabricated by plating the high-oriented CoP film or the low-oriented CoP film with a ring-type head of a commercial VHS video head. Perpendicular recording was performed on the high-oriented CoP film to demonstrate the best characteristics. The use of an oriented underlayer is thus confirmed to be a useful method of controlling the structure of the magnetic film in addition to controlling the bath plating parameters.

UR - http://www.scopus.com/inward/record.url?scp=0024621072&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024621072&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0024621072

VL - 136

SP - 753

EP - 756

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 3

ER -