Localized magnetic fields in arbitrary directions using patterned nanomagnets

Robert P.G. McNeil, R. Jeff Schneble, Masaya Kataoka, Christopher J.B. Ford, Takeshi Kasama, Rafal E. Dunin-Borkowski, Joshua M. Feinberg, Richard J. Harrison, Crispin H.W. Barnes, Desmond H.Y. Tse, Theodossis Trypiniotis, J. Anthony C. Bland, David Anderson, Geb A.C. Jones, Michael Pepper

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Control of the local magnetic fields desirable for spintronics and quantum information technology is not well developed. Existing methods produce either moderately small local fields or one field orientation. We present designs of patterned magnetic elements that produce remanent fields of 50 mT (potentially 200 mT) confined to chosen, submicrometer regions in directions perpendicular to an external initializing field. A wide variety of magnetic-field profiles on nanometer scales can be produced with the option of applying electric fields, for example, to move a quantum dot between regions where the magnetic-field direction or strength is different. We have confirmed our modeling by measuring the fields in one design using electron holography.

Original languageEnglish (US)
Pages (from-to)1549-1553
Number of pages5
JournalNano letters
Volume10
Issue number5
DOIs
StatePublished - May 12 2010

Keywords

  • Electron holography
  • Magnetic field
  • Nanomagnet
  • Permalloy

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