Quantum magnetic disk

Stephen Y. Chou, Peter R. Krauss

Research output: Contribution to journalConference articlepeer-review

24 Scopus citations


A quantum magnetic disk (QMD) - a new paradigm for magnetic recording - is proposed and fabricated. The QMD consists of pre-fabricated single-domain magnetic structures that have an identical shape and are uniformly embedded in a nonmagnetic disk. Each single-domain structure has a quantized magnetic moment and can store one bit of information. The QMD has a number of advantages over the conventional disk and is suitable for ultra-high density recording. Two processes based on electron beam nanolithography and other nanofabrication technologies have been developed to fabricate QMDs. QMDs with a density of 65 Gbits/in2 - over two orders of magnitude greater than the state-of-the-art magnetic storage density - have been demonstrated. A method for mass production of QMD without employing lithography is discussed.

Original languageEnglish (US)
Pages (from-to)151-153
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3
StatePublished - 1996
Externally publishedYes
EventProceedings of the 1995 6th International Conference on Magnetic Recording Media, MRM - Oxford, UK
Duration: Jul 16 1995Jul 19 1995

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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