Patterned magnetic nanostructures and quantized magnetic disks

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372 Scopus citations

Abstract

Nanofabrication, offering unprecedented capabilities in the manipulation of material structures and properties, opens up new opportunities for engineering innovative magnetic materials, and devices, developing iiltra-high-density magnetic storage, and understanding micromagnetics. This paper reviews the recent advances in patterned magnetic nanostructures, a fast-emerging field, including 1) state-of-the-art technology for patterning of magnetic nanostructures as small as 10 nm; 2) engineering of unique magnetic properties (such as domain structures, domain switching, and magnetoresistance) by patterning and controlling the size, shape, spacing, orientation, and compositions of magnetic materials; 3) quantized magnetic disks - a new paradigm for ultra-high-density magnetic storage based on patterned single-domain elements that have demonstrated a storage density of 65 Gb/in2 (nearly two orders of magnitude higher than that in current commercial magnetic disks) and a capability of 400 Gb/in2; 4) novel magnetoresistance sensors based on unique properties of magnetic nanostructures; 5) other applications of nanoscale patterning in magnetics such as the quantification of magnetic force microscopy (MFM), and a new ultra-high-resolution MFM tip; and 6) sub-10-nm imprint lithography - a new low-cost, high-throughput technology for manufacturing magnetic nanostructures.

Original languageEnglish (US)
Pages (from-to)652-671
Number of pages20
JournalProceedings of the IEEE
Volume85
Issue number4
DOIs
StatePublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Magnetic nanostriicture
  • Magnetoresistance
  • Nanoimprint lithography
  • Quantized magnetic disk
  • Quantum magnetic disk

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