The use of high temperature superconducting films for the magnetic storage of information

Author

Cairns, Jim ; Zhang, Zhihang ; Barnes, Frank S. ; Dugas, Matthew P.

Author_Institution

Dept. of Electr. Eng., Colorado Univ., Boulder, CO, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2077

Lastpage

2080

Abstract

The authors discuss the first use of high-temperature superconducting films as an information recording medium in a format that could be modified for use in a large disc drive system. The system uses Abrikosov vortices to store integer units of magnetic flux in a hysteresis loop. A proof-of-principle system has been assembled using a 0.3 μm film of YBCO on LaAlO₃ with T_c=81 K; bits approximately 1.9 mm in diameter were recorded and read. It is noted that there are a great many improvements needed to make the system design a practical recording medium. However, this material has the potential advantage of being able to store a single bit of information with a single flux quantum, and thus the possibility for the storage of information with very high densities

Keywords

barium compounds; cryoelectric stores; flux pinning; high-temperature superconductors; magnetic hysteresis; superconducting thin films; yttrium compounds; 81 K; Abrikosov vortices; LaAlO₃; YBaCuO; high temperature superconducting films; hysteresis loop; information recording medium; large disc drive system; magnetic flux; magnetic information storage; proof-of-principle system; single flux quantum; Assembly systems; Disk recording; Drives; Magnetic flux; Magnetic hysteresis; Magnetic recording; Material storage; Superconducting films; Superconducting magnets; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179403

Filename

179403