Study on Preparation of High Quality Magneto-optical Oxide Films by Gel-Coating Technique

凝胶涂覆技术制备高质量磁光氧化物薄膜的研究

• 批准号: 10650308
• 负责人: FUJII Toshitaka
• 金额: $ 2.24万
• 依托单位: Toyohashi University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650308/
• 关键词: Infrared light heating; intermittent light irradiation; Rapid crystallization; Magnetic garnet films; Magneto-photonic crystals; 間欠光照射; プラスチック基板; 超高密度光磁気記録媒体

Bi-substituted rare-earth iron garnet (Bi : RlG) films have been promised for ultra-high density magneto-optical (MO) storage media in the next generation, because of a large MO-efficient in the blue wavelength region in cooperation with realization of commercial blue-light laser diodes. In connection with down-sized optotronic devices, film-type optical isolators have been requested. For this purpose, magnetophotonic crystals with Bi-RlG film is a promising candidate. A key technology for realizing these is to synthesize high quality Bi : RlG films at low temperature, which is the major theme of the investigation.(1) Synthesis of high quality Bi : RlG films………Bi : RlG films could be fabricated by coating gels prepared by the "glycol gel process" and rf-sputtering. The fabrication conditions to obtain defect-free and optically flat Bi : RlG films with good magnetic properties were determined experimentally.(2) Low temperature synthesis of Bi : RlG films………Formation of Bi : RlG films on polycarbonate plastic plates is desirable to use MO-memory disks. Lowering crystallization temperature of garnet is indispensable. Rapid annealing of pulse-like irradiation of infra-red light was found to be very useful to lower effective crystallization temperature of garnet to allow to use plastic substrates. This method was also found to be useful for fabrication of magnetophotonic crystals by thermal annealing.(3) Combined with (1) and (2), we could successfully construct magnetopotonic crystals with a multi-layer system of (SiOィイD22ィエD2/TaィイD22ィエD2)ィイD15ィエD1Bi:YIG(TaィイD22ィエD2OィイD25ィエD2/SiOィイD22ィエD2)ィイD15ィエD1. The optical and magneto-optical properties of the films coincided quantitatively with those evaluated by theoretical analysis.(4) Construction of a film-type optical isolator operating at λ=1.3μm utilizing magnetophonic crystals is now under way.

Bi取代的稀土铁石榴石（Bi：RlG）薄膜由于在蓝光波段具有很高的磁光效率，并可实现商用蓝光激光二极管，有望成为下一代超高密度磁光存储介质。与小型化的光电子器件有关，已经要求薄膜型光隔离器。为此，具有Bi-RlG膜的磁光子晶体是一个有希望的候选者。实现这一目标的关键技术是低温合成高质量的Bi：RlG薄膜，这是本研究的主要内容。(1)高质量Bi：RlG薄膜的合成...实验确定了制备无缺陷、光学平坦、磁性能良好的Bi：RlG薄膜的工艺条件。(2)Bi：RlG薄膜的低温合成在聚碳酸酯塑料板上形成Bi：RlG薄膜对于使用MO存储盘是期望的。降低石榴石的晶化温度是必不可少的。红外线脉冲式照射的快速退火被发现对于降低石榴石的有效结晶温度以允许使用塑料衬底是非常有用的。这种方法也被发现是有用的磁光子晶体的热退火制造。(3)结合（1）和（2），我们可以成功地构造出（SiO_2 O_2薄膜的光学和磁光性能与理论分析结果定量吻合。(4)目前正在利用磁声子晶体研制工作在λ=1.3μm的薄膜型光隔离器。

项目成果

M.Inoue, K.Yayoi, T.Takayama, K.Nakamura, and T.Fujii: "One-dimensional Magnetophotonic Crystals Composed of Rare-Earth Iron Garnet Films"Proc. of 2nd International Symposium of Frontier in Magnetism (Stockholm), Aug.. 12-15 [in print]. (1999)

M.Inoue、K.Yayoi、T.Takayama、K.Nakamura 和 T.Fujii：“由稀土铁石榴石薄膜组成的一维磁光子晶体”Proc。

高山知子: "Bi置換YIG膜を用いた1次元フォトニック結晶の作製と特性"日本応用磁気学会誌. (印刷中) 24・4-2. (2000)

高山智子：“使用Bi取代YIG薄膜的一维光子晶体的制备和性能”日本应用磁学学会杂志（出版中）24・4-2（2000年）。

T. Sato, K. Yamaguchi, T. Fujii, and M. Inoue: "Magnetic and Magnetro-optical Properties of Nano-size Cobalt Particles Dispersed in a Plastic [in Japanese]"J. Magn. Soc. Jpn.. Vol22, No.4-2. 1077-1080 (1999)

T. Sato、K. Yamaguchi、T. Fujii 和 M. Inoue：“分散在塑料中的纳米级钴颗粒的磁性和磁光特性 [日语]”J。

井上光輝: "1次元磁性フォトニック結晶の局在モードの磁気光学性能指数"日本応用磁気学会誌. 23・7. 1861-1866 (1999)

Mitsuteru Inoue：“一维磁性光子晶体中局域模式的磁光品质因数”日本应用磁学学会杂志 23・7（1999 年）。

M. Inoue: "One-Dimensional Magnetophotonic Crystals Composed of Rare-Earth Iron Garnet Films"Proc. of 2nd International Symp. of Frontier Magnetism. (in print). (2000)

M. Inoue：“由稀土铁石榴石薄膜组成的一维磁光子晶体”Proc。