Microscopic Magnetic Characteristics of CoCrPt-Patterned Media Made by Artificially Aligned Self-Organized Mask

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概要

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• The microscopic magnetic characteristics of CoCrPt-patterned media after magnetic recording by a ring head were investigated. The media consists of two rows of aligned CoCrPt dots with a diameter of 40 nm. The magnetization reversal of each dot is clearly observed by magnetic force microscopy (MFM). A few misreversed dots were observed in the written “bit” patterns. The distribution of coercivity $H_{\text{c}}$ was investigated by MFM using dot-by-dot analysis. It was found that $H_{\text{c}}$ is about 4 kOe on the average with a wide distribution ranging from 0.5 to 7.5 kOe. This large distribution of $H_{\text{c}}$ causes these magnetization reversal defects. One possible origin of the large $H_{\text{c}}$ distribution is the grain boundary observed in each grain of the CoCrPt layer.

• 2007-03-15

著者

• Bai Jianmin

  Venture Business Laboratory Akita University

• Kikitsu Akira

  Corporate Research & Development Center Toshiba Corporation

• Naito Katsuyuki

  Corporate Research & Development Center Toshiba Corporation

• KAMATA Yoshiyuki

  Corporate Research & Development Center, Toshiba Corporation

• HIEDA Hiroyuki

  Corporate Research & Development Center, Toshiba Corporation

• SAKURAI Masatoshi

  Corporate Research & Development Center, Toshiba Corporation

• ISHIO Shunji

  Venture Business Laboratory, Akita University

• Hieda Hiroyuki

  Corporate Research & Development Center, Toshiba Corporation, Kawasaki 212-8582, Japan

• Sakurai Masatoshi

  Corporate Research & Development Center, Toshiba Corporation, Kawasaki 212-8582, Japan

• Naito Katsuyuki

  Corporate Research & Development Center, Toshiba Corporation, Kawasaki 212-8582, Japan

• Bai Jianmin

  Venture Business Laboratory, Akita University, Akita 010-8502, Japan

• Kikitsu Akira

  Corporate Research & Development Center, Toshiba Corporation, Kawasaki 212-8582, Japan

• Ishio Shunji

  Venture Business Laboratory, Akita University, Akita 010-8502, Japan

関連論文

• Microscopic Magnetic Characteristics of CoCrPt-Patterned Media Made by Artificially Aligned Self-Organized Mask
• Self-Organized Cohesion of Organic Molecular Dots on Chemically Patterned Surface(Atoms, Molecules, Chemical Physics)
• Microscopic Magnetic Characteristics of CoCrPt-Patterned Media Made by Artificially Aligned Self-Organized Mask
• Nanoimprint Mold for 2.5 Tbit/in. Directed Self-Assembly Bit Patterned Media with Phase Servo Pattern

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