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

doi:10.1021/nl902949v

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

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

21 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 language	English (US)
Pages (from-to)	1549-1553
Number of pages	5
Journal	Nano letters
Volume	10
Issue number	5
DOIs	https://doi.org/10.1021/nl902949v
State	Published - May 12 2010

Keywords

Electron holography
Magnetic field
Nanomagnet
Permalloy

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McNeil, R. P. G., Schneble, R. J., Kataoka, M., Ford, C. J. B., Kasama, T., Dunin-Borkowski, R. E., Feinberg, J. M., Harrison, R. J., Barnes, C. H. W., Tse, D. H. Y., Trypiniotis, T., Bland, J. A. C., Anderson, D., Jones, G. A. C., & Pepper, M. (2010). Localized magnetic fields in arbitrary directions using patterned nanomagnets. Nano letters, 10(5), 1549-1553. https://doi.org/10.1021/nl902949v

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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.",

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AU - McNeil, Robert P.G.

AU - Schneble, R. Jeff

AU - Kataoka, Masaya

AU - Ford, Christopher J.B.

AU - Kasama, Takeshi

AU - Dunin-Borkowski, Rafal E.

AU - Feinberg, Joshua M.

AU - Harrison, Richard J.

AU - Barnes, Crispin H.W.

AU - Tse, Desmond H.Y.

AU - Trypiniotis, Theodossis

AU - Bland, J. Anthony C.

AU - Anderson, David

AU - Jones, Geb A.C.

AU - Pepper, Michael

PY - 2010/5/12

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N2 - 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.

AB - 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.

KW - Electron holography

KW - Magnetic field

KW - Nanomagnet

KW - Permalloy

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Localized magnetic fields in arbitrary directions using patterned nanomagnets

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