Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1989-04-27
1990-12-04
Morris, Theodore
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428630, 428642, 428428, 428463, 420577, G11B 562, C22C 1200
Patent
active
049753363
ABSTRACT:
this invention relates to an alloy material for data storage of magneto-optical disk (ADSMO), as well as its manufacturing process. ADSMO is based on manganese, bismuth and doped with aluminum atoms and silicon atoms or by aluminum atoms and boron atoms. The above mentioned elements are deposited onto a transparent substrate in a certain sequence using an evaporation process or sputtering process, and then compact hexagonal cyrstalline structures are formed after being annealed in vacuum. ADSMO has a large magneto-optical Kerr rotation, a small size of crystal grains and a stable structure; its manufacturing process is easy and simple.
REFERENCES:
patent: 3615892 (1971-10-01), Heinzelman et al.
patent: 4543301 (1985-09-01), Yazawa et al.
patent: 4833020 (1989-05-01), Shiroishi et al.
Journal of Allied Physics, vol. 35, No. 3, Mar. 1964, D. Chen and Y. Gondo, "Temperature in Oriented MnBi Films" pp. 1024-1025.
Journal of Applied Physics, vol. 41, No. 3, Mar. 1970, D. Chen, R. L. Aagard & T. S. Liu-"Magneto-Optic Properties of Quenched then Films of MnBi and Optical Memory Experiements", p. 1395-1396.
Japanese Journal of Applied Physics, vol. 26, No. 5, May 1987 pp. 707-712, Morio MasudamIchiro Izawa, Seiji Yoshino, Sigeru Shiomi & Susumu Uchiuama "Preparation, Magetic and Magneto-Optic Properties of Small-Crystallite MnBi Films".
Li Zhao H.
Shen Jianxiang
Tang Qian
Wang Yinjun
Institute of Physics Chinese Academy of Sciences
Morris Theodore
Wyszomierski George
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