Effect of palladium nuclei insertion by electroless deposition on magnetic intergranular isolation and read/write characteristics in SmCo5 perpendicular magnetic recording media

Atsushi Sugiyama; Yuko Egawa; Isao Koizumi; Masahiro Yoshino; Jiro Hokkyo; Toru Asahi; Takanori Kiya; Jun Ariake; Kazuhiro Ouchi; Tetsuya Osaka

doi:10.1016/j.phpro.2011.06.110

Effect of palladium nuclei insertion by electroless deposition on magnetic intergranular isolation and read/write characteristics in SmCo₅ perpendicular magnetic recording media

Atsushi Sugiyama, Yuko Egawa, Isao Koizumi, Masahiro Yoshino, Jiro Hokkyo, Toru Asahi, Takanori Kiya, Jun Ariake, Kazuhiro Ouchi, Tetsuya Osaka^*

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

Abstract

In order to improve the magnetic intergranular isolation between the magnetic grains in the SmCo₅ perpendicular magnetic recording media, the palladium nuclei deposited by an electrochemical process were introduced into a sputter deposition process of the SmCo₅ film. A few nanometer size Pd nuclei were electrochemically deposited on the sputtered Cu underlayer by a displacement deposition (chemical plating). The sizes of Pd nuclei were controlled by adjusting the Pd ion concentration in electrolyte solutions. The magnetic domain size in Sm-Co layer deposited on Pd nuclei / Cu / Ti underlayer became smaller and the magnetization reversal process was changed from the wall motion to the coherent rotation. Moreover, the read/write characteristics were improved at higher linear recording densities.

Original language	English
Pages (from-to)	68-74
Number of pages	7
Journal	Physics Procedia
Volume	16
DOIs	https://doi.org/10.1016/j.phpro.2011.06.110
Publication status	Published - 2011
Event	9th Perpendicular Magnetic Recording Conference, PMRC 2010 - Sendai, Japan Duration: 2011 May 17 → 2011 May 19

Keywords

Electroless deposition
Perpendicular magnetic recording
Read/write(R/W) characteristics

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1016/j.phpro.2011.06.110

Cite this

Sugiyama, A., Egawa, Y., Koizumi, I., Yoshino, M., Hokkyo, J., Asahi, T., Kiya, T., Ariake, J., Ouchi, K., & Osaka, T. (2011). Effect of palladium nuclei insertion by electroless deposition on magnetic intergranular isolation and read/write characteristics in SmCo₅ perpendicular magnetic recording media. Physics Procedia, 16, 68-74. https://doi.org/10.1016/j.phpro.2011.06.110

Sugiyama, A, Egawa, Y, Koizumi, I, Yoshino, M, Hokkyo, J, Asahi, T, Kiya, T, Ariake, J, Ouchi, K & Osaka, T 2011, 'Effect of palladium nuclei insertion by electroless deposition on magnetic intergranular isolation and read/write characteristics in SmCo₅ perpendicular magnetic recording media', Physics Procedia, vol. 16, pp. 68-74. https://doi.org/10.1016/j.phpro.2011.06.110

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abstract = "In order to improve the magnetic intergranular isolation between the magnetic grains in the SmCo5 perpendicular magnetic recording media, the palladium nuclei deposited by an electrochemical process were introduced into a sputter deposition process of the SmCo5 film. A few nanometer size Pd nuclei were electrochemically deposited on the sputtered Cu underlayer by a displacement deposition (chemical plating). The sizes of Pd nuclei were controlled by adjusting the Pd ion concentration in electrolyte solutions. The magnetic domain size in Sm-Co layer deposited on Pd nuclei / Cu / Ti underlayer became smaller and the magnetization reversal process was changed from the wall motion to the coherent rotation. Moreover, the read/write characteristics were improved at higher linear recording densities.",

keywords = "Electroless deposition, Perpendicular magnetic recording, Read/write(R/W) characteristics",

author = "Atsushi Sugiyama and Yuko Egawa and Isao Koizumi and Masahiro Yoshino and Jiro Hokkyo and Toru Asahi and Takanori Kiya and Jun Ariake and Kazuhiro Ouchi and Tetsuya Osaka",

note = "Funding Information: This work was partly supported by the Grant-in-Aid for Specially Promoted Research “Establishment of Electrochemical Device Engineering” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, by Global COE program “Center for Practical Chemical Wisdom” from MEXT.; 9th Perpendicular Magnetic Recording Conference, PMRC 2010 ; Conference date: 17-05-2011 Through 19-05-2011",

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AU - Sugiyama, Atsushi

AU - Egawa, Yuko

AU - Koizumi, Isao

AU - Yoshino, Masahiro

AU - Hokkyo, Jiro

AU - Asahi, Toru

AU - Kiya, Takanori

AU - Ariake, Jun

AU - Ouchi, Kazuhiro

AU - Osaka, Tetsuya

N1 - Funding Information: This work was partly supported by the Grant-in-Aid for Specially Promoted Research “Establishment of Electrochemical Device Engineering” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, by Global COE program “Center for Practical Chemical Wisdom” from MEXT.

PY - 2011

Y1 - 2011

N2 - In order to improve the magnetic intergranular isolation between the magnetic grains in the SmCo5 perpendicular magnetic recording media, the palladium nuclei deposited by an electrochemical process were introduced into a sputter deposition process of the SmCo5 film. A few nanometer size Pd nuclei were electrochemically deposited on the sputtered Cu underlayer by a displacement deposition (chemical plating). The sizes of Pd nuclei were controlled by adjusting the Pd ion concentration in electrolyte solutions. The magnetic domain size in Sm-Co layer deposited on Pd nuclei / Cu / Ti underlayer became smaller and the magnetization reversal process was changed from the wall motion to the coherent rotation. Moreover, the read/write characteristics were improved at higher linear recording densities.

AB - In order to improve the magnetic intergranular isolation between the magnetic grains in the SmCo5 perpendicular magnetic recording media, the palladium nuclei deposited by an electrochemical process were introduced into a sputter deposition process of the SmCo5 film. A few nanometer size Pd nuclei were electrochemically deposited on the sputtered Cu underlayer by a displacement deposition (chemical plating). The sizes of Pd nuclei were controlled by adjusting the Pd ion concentration in electrolyte solutions. The magnetic domain size in Sm-Co layer deposited on Pd nuclei / Cu / Ti underlayer became smaller and the magnetization reversal process was changed from the wall motion to the coherent rotation. Moreover, the read/write characteristics were improved at higher linear recording densities.

KW - Electroless deposition

KW - Perpendicular magnetic recording

KW - Read/write(R/W) characteristics

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T2 - 9th Perpendicular Magnetic Recording Conference, PMRC 2010

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