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Journal of Undergraduate Research

Keywords

spatial dependence, magnetic domain memory, exchange-bias films

College

Physical and Mathematical Sciences

Department

Physics and Astronomy

Abstract

One of the greatest challenges facing the magnetic data storage industry is the sensitivity of magnetic media to degradation by external fields. Because of this sensitivity, long-term archival data storage, which is required by law for many industries, has become very expensive to upkeep. To protect against possible degradation, most long-term archives must be removed, read, and re-recorded every few years. This process is very labor-intensive, time consuming, and expensive. This has led to the search for magnetic systems which have intrinsic magnetic domain memory, or ability of the magnetic domains within the sample to reproduce their former pattern (see Fig. 1) after saturation by an external field. Information stored in such domains could not be erased by external fields.

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