Localized magnetic fields in arbitrary directions using patterned nanomagnets

Robert P G McNeil, 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 journalJournal articleResearchpeer-review

    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 held orientation. We present designs of patterned magnetic elements that produce remanent fields of 50 mT (potentially 200 Rif) confined to chosen, submicrometer regions in directions perpendicular to an external initializing field. A wide variety of magnetic-field profiles on nanorneter scales can be produced with the option of applying electric fields, for example, to move a quantum clot 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
    JournalNano Letters
    Volume10
    Issue number5
    Pages (from-to)1549-1553
    ISSN1530-6984
    DOIs
    Publication statusPublished - 2010

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