Single-domain magnetic pillar array of 35 nm diameter and 65 Gbits/in. 2 density for ultrahigh density quantum magnetic storage

Stephen Y. Chou, Mark S. Wei, Peter R. Krauss, Paul B. Fischer

Research output: Contribution to journalArticlepeer-review

345 Scopus citations


Using electron beam nanolithography and electroplating, arrays of Ni pillars on silicon that have a uniform diameter of 35 nm, a height of 120 nm, and a period of 100 nm were fabricated. The density of the pillar arrays is 65 Gbits/in.2 - over two orders of magnitude greater than the state-of-the-art magnetic storage density. Because of their nanoscale size, shape anisotropy, and separation from each other, each Ni pillar is single domain with only two quantized perpendicular magnetization states: up and down. Each pillar can be used to store one bit of information, therefore such nanomagnetic pillar array storage offers a rather different paradigm than the conventional storage method. A quantum magnetic disk scheme that is based on uniformly embedding single-domain magnetic structures in a nonmagnetic disk is proposed.

Original languageEnglish (US)
Pages (from-to)6673-6675
Number of pages3
JournalJournal of Applied Physics
Issue number10
StatePublished - 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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