Title :
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
fDate :
9/1/1992 12:00:00 AM
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 Tc=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;
Journal_Title :
Magnetics, IEEE Transactions on
