磁気ホログラム記録用熱拡散多層膜記録媒体の開発

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2020/03/01

タイトル(英語): Development of Heat Dissipation Multilayered Media for Magnetic Hologram Memory

著者名: 中村　雄一（豊橋技術科学大学），林　攀梅（豊橋技術科学大学），後藤　太一（豊橋技術科学大学），内田　裕久（豊橋技術科学大学），井上　光輝（豊橋技術科学大学）

著者名(英語): Yuichi Nakamura (Toyohashi University of Technology), Pang Boey Lim (Toyohashi University of Technology), Taichi Goto (Toyohashi University of Technology), Hironaga Uchida (Toyohashi University of Technology), Mitsuteru Inoue (Toyohashi University of Technology)

キーワード: 磁気ホログラムメモリ，熱磁気記録，記録媒体　　magnetic hologram memory，thermomagnetic recording，recording medium

要約(英語): Holographic memory is a strong candidate for next-generation optical storage with high recording densities and data transfer rates, and magnetic hologram memory using a magnetic garnet, as the recording material, is expected to be used as a rewritable and stable storage technology. We succeeded in recording and reconstruction of 2D data in magnetic hologram without error. However, the diffraction efficiency is insufficiently high for actual storage devices. To increase the diffraction efficiency, it is important to record deep magnetic fringes whereas the merging of fringes due to the excess heat near the medium surface generated during the thermomagnetic recording process must be suppressed. To avoid this merge of fringes, we proposed a multi-layered structure in which the magnetic layers are divided by the transparent heat dissipation layers (HDL) to control the heat diffusion. In this study, we propose a simple thermal design method for designing the HDL multilayer structure. Using this model, we designed and fabricated a HDL multilayer medium in which the recording magnetic layers are discrete in the film. The HDL multilayer medium exhibited diffraction efficiency higher than that of the single layer medium, and error-free recording and reconstruction were achieved using the magnetic assist technique.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.140 No.3 （2020） 特集：光・熱・磁気の相互作用を利用した新規スピンデバイス・ストレージ

本誌掲載ページ: 125-130 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/140/3/140_125/_article/-char/ja/