Research Achievements - Original paper -

Nitridation process of Al layer by microwave-excited plasma and large magnetoresistance in Co-Fe / Al-N / Co-Fe tunnel junctions

S. Yoshimura, T. Shoyama, T. Nozawa, M. Tsunoda, and M. Takahashi

IEEE Transactions on Magnetics   40 ( 4 ) 2290 - 2292   2004.01  [Refereed]

Research paper (journal)   Domestic Co-author

強磁性トンネル接合用Al薄膜の酸化過程とマイクロ波励起プラズマ中の酸化種との相関

吉村 哲, 角田 匡清, 尾形 聡, 高橋 研

Journal of the Magnetics Society of Japan (日本応用磁気学会誌)   27 ( 12 ) 1130 - 1134   2003.12  [Refereed]

Research paper (journal)   Domestic Co-author

Effect of Naturally Adsorbed Gas on Substrate Surface on the Growth of Very Thin WCr Seedlayer

S. Yoshimura, D. D. Djayaprawira, Y. Takakuwa, and M. Takahashi

IEEE Transactions on Magnetics   39 ( 5 ) 2270 - 2272   2003.07  [Refereed]

Research paper (journal)   Domestic Co-author

Effect of Oxidation Process on Grain Size Reduction for Longitudinal Media Using Ni-baced Amorphous Seedlayer

M. Mikami, D. D. Djayaprawira, S. Yoshimura, and M. Takahashi

IEEE Transactions on Magnetics   39 ( 5 ) 2258 - 2261   2003.07  [Refereed]

Research paper (journal)   Domestic Co-author

The Effect of Very Thin Cr-based Seedlayer Material with Different Affinity for Oxygen on Thin Film Media Microstructure and Recording Properties

S. Yoshimura, D. D. Djayaprawira, Y. Takakuwa, and M. Takahashi

Journal of Applied Physics   93 ( 10 ) 8465 - 8467   2003.04  [Refereed]

Research paper (journal)   Domestic Co-author

Improvement of Exchange Bias Field by Introduction of Oxygen During Deposition of Ru Layer in Antiferromagnetic Coupled Media

D. D. Djayaprawira, H. Domon, S. Yoshimura, and M. Takahashi

Journal of Applied Physics   93 ( 10 ) 7408 - 7410   2003.04  [Refereed]

Research paper (journal)   Domestic Co-author

Dependence of Thin-Film Media Properties on the Composition of a Very Thin Cr-Based Seedlayer: Relation between Growth Form, Melting Point, Affinity for Oxygen of a Cr-Based Seedlayer, and Media Microstructure

S. Yoshimura, D. D. Djayaprawira, M. Mikami, Y. Takakuwa, and M. Takahashi

Journal of the Magnetics Society of Japan   27 ( 4 ) 234 - 240   2003.01  [Refereed]

Research paper (journal)   Domestic Co-author

Control of thin film medis microstructure by using very thin seedlayer material with different affinity for oxygen

D. D. Djayaprawira, S. Yoshimura, and M. Takahashi

Journal of Magnetics   73 ( 3 ) 106 - 114   2002.12  [Refereed]  [Invited]

Research paper (journal)   Domestic Co-author

Dependence of thin film media microstructure and recording properties on composition of very thin Cr-based seedlayer

S. Yoshimura, D. D. Djayaprawira, M. Mikami, Y. Takakuwa, and M. Takahashi

IEEE Transactions on Magnetics   38 ( 5 ) 1958 - 1960   2002.10  [Refereed]

Research paper (journal)   Domestic Co-author

Magnetic Grain Size Reduction by Using Oxygen Exposure Process onto Very Thin WCr Seedlayer in Longitudinal Media

S. Yoshimura, D. D. Djayaprawira, M. Mikami, M. Takahashi, K. Komiyama, A. Horii, A. Ohno, and S. Katayama

Journal of Applied Physics   91 ( 10 ) 8629 - 8631   2002.04  [Refereed]

Research paper (journal)   Domestic Co-author

Study on Increasing Coercivity in CoCrPtB Media with High Pt Content

M. Mikami, D. D. Djayaprawira, H. Domon, S. Yoshimura, M. Takahashi, and K. Komiyama

Journal of Applied Physics   91 ( 10 ) 7074 - 7076   2002.04  [Refereed]

Research paper (journal)   Domestic Co-author

Dependence of Exchange Bias Field on Composition of Stabilizing Layer and Sputtering Process in Synthetic Ferrimagnetic Coupled Media

D. D. Djayaprawira, K. Komiyama, S. Yoshimura, T. Michalke, and M. Takahashi

Journal of Magnetism and Magnetic Materials   239   396 - 398   2002.03  [Refereed]

Research paper (journal)   Domestic Co-author

Correlation between Activation Volume and Intergranular Magnetic Interaction in Longitudinal Media

M. Mikami, D. D. Djayaprawira, Tham Kim Kong, S. Yoshimura, A. Horii, and M. Takahashi

IEEE Transactions on Magnetics   37 ( 4 ) 1484 - 1486   2001.10  [Refereed]

Research paper (journal)   Domestic Co-author

Improvement of Magnetic and R/W Properties in Longitudinal Media by Using CrX/Cr Dual Underlayer

D. D. Djayaprawira, A. Horii, K. Komiyama, S. Yoshimura, M. Mikami, H. Domon, and M. Takahashi

IEEE Transactions on Magnetics   37 ( 4 ) 1497 - 1499   2001.10  [Refereed]

Research paper (journal)   Domestic Co-author

Grain Size Reduction by Utilizing a Very Thin, High-melting-point WCr Seedlayer in Longitudinal Media: Media Noise Reduction in High Hkgrain Media

Journal of the Magnetics Society of Japan   25 ( 40635 ) 627 - 630   2001.04  [Refereed]

Research paper (journal)   Domestic Co-author

Novel Sputtering Process to Reduce The Grain Size and Its Distribution In Co-based Longitudinal Thin Film Media (New Seedlayer and High Kugrain Materials)

M. Takahashi, H. Shoji, D. D. Djayaprawira, and S. Yoshimura

IEEE Transactions on Magnetics   36 ( 5 ) 2315 - 2320   2000.10  [Refereed]  [Invited]

Research paper (journal)   Domestic Co-author

Media Noise Reduction In Co-based Longitudinal Media with New Co co-precipitated NiP/Al Substrate

S. Yoshimura, D. D. Djayaprawira, Tham Kim Kong, Y. Masuda, H. Shoji, and M. Takahashi

IEEE Transactions on Magnetics   36 ( 5 ) 2363 - 2365   2000.10  [Refereed]

Research paper (journal)   Domestic Co-author

Challenge to a Physical Limit in Longitudinal High Density Recording Media

M. Takahashi, H. Shoji, S. Yoshimura, and D. D. Djayaprawira

Electrochemical Society Proceedings   99 ( 34 ) 273 - 285   2000.08  [Refereed]  [Invited]

Research paper (journal)   Domestic Co-author

Grain Size Reduction by Utilizing Very Thin CrW Seedlayer and Dry-Etching Process in CoCrTaNiPt Longitudinal Media

S. Yoshimura, D. D. Djayaprawira, Tham Kim Kong, Y. Masuda, H. Shoji, and M.Takahashi

Journal of Applied Physics   87 ( 9 ) 6860 - 6862   2000.01  [Refereed]

Research paper (journal)   Domestic Co-author

Magnetic and Structural Properties of CoCrTaNiPt Longitudinal Thin Film Media

S. Yoshimura, D. D. Djayaprawira, H. Shoji, and M. Takahashi

Journal of Applied Physics   87 ( 9 ) 6866 - 6868   2000.01  [Refereed]

Research paper (journal)   Domestic Co-author