Chirality control of magnetic vortex in a square Py dot using current-induced Oersted field

S. Yakata; M. Miyata; S. Honda; H. Itoh; H. Wada; T. Kimura

doi:10.1063/1.3669410

Chirality control of magnetic vortex in a square Py dot using current-induced Oersted field

S. Yakata, M. Miyata, S. Honda, H. Itoh, H. Wada, T. Kimura

Condensed Matter Physics

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

21 Citations (Scopus)

Abstract

We have proposed a method for controlling the vortex chirality in a squared permalloy dot by using the circular Oersted field locally induced by flowing a DC current across a small Py/Cu junctions. The reliability of the chirality control has been evaluated by measuring the nonlocal spin valve signal. The desired vortex chirality has been obtained when the injecting DC current has a moderate magnitude. However, the large DC current is found to reduce the control reliability. Another possibility for controlling the vortex structure using the large DC current injection was also discussed.

Original language	English
Article number	242507
Journal	Applied Physics Letters
Volume	99
Issue number	24
DOIs	https://doi.org/10.1063/1.3669410
Publication status	Published - Dec 12 2011

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3669410

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title = "Chirality control of magnetic vortex in a square Py dot using current-induced Oersted field",

abstract = "We have proposed a method for controlling the vortex chirality in a squared permalloy dot by using the circular Oersted field locally induced by flowing a DC current across a small Py/Cu junctions. The reliability of the chirality control has been evaluated by measuring the nonlocal spin valve signal. The desired vortex chirality has been obtained when the injecting DC current has a moderate magnitude. However, the large DC current is found to reduce the control reliability. Another possibility for controlling the vortex structure using the large DC current injection was also discussed.",

author = "S. Yakata and M. Miyata and S. Honda and H. Itoh and H. Wada and T. Kimura",

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AU - Yakata, S.

AU - Miyata, M.

AU - Honda, S.

AU - Itoh, H.

AU - Wada, H.

AU - Kimura, T.

N1 - Funding Information: This work is partially supported by Industrial Technology Research Grant Program from NEDO, and CREST from JST.

PY - 2011/12/12

Y1 - 2011/12/12

N2 - We have proposed a method for controlling the vortex chirality in a squared permalloy dot by using the circular Oersted field locally induced by flowing a DC current across a small Py/Cu junctions. The reliability of the chirality control has been evaluated by measuring the nonlocal spin valve signal. The desired vortex chirality has been obtained when the injecting DC current has a moderate magnitude. However, the large DC current is found to reduce the control reliability. Another possibility for controlling the vortex structure using the large DC current injection was also discussed.

AB - We have proposed a method for controlling the vortex chirality in a squared permalloy dot by using the circular Oersted field locally induced by flowing a DC current across a small Py/Cu junctions. The reliability of the chirality control has been evaluated by measuring the nonlocal spin valve signal. The desired vortex chirality has been obtained when the injecting DC current has a moderate magnitude. However, the large DC current is found to reduce the control reliability. Another possibility for controlling the vortex structure using the large DC current injection was also discussed.

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Chirality control of magnetic vortex in a square Py dot using current-induced Oersted field

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