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Symmetry locking and commensurate vortex domain formation in periodic pinning arrays

Symmetry locking and commensurate vortex domain formation in periodic pinning arrays
Symmetry locking and commensurate vortex domain formation in periodic pinning arrays
The spontaneous formation of domains of commensurate vortex patterns near rational fractional matching fields of a periodic pinning array has been investigated with high resolution scanning Hall probe microscopy. We show that domain formation is promoted due to the efficient incorporation of mismatched excess vortices and vacancies at the corners of domain walls, which outweighs the energetic cost of creating them. Molecular dynamics simulations with a generic pinning potential reveal that domains are formed only when vortex-vortex interactions are long range.
0031-9007
237001-[4pp]
Grigorenko, A.N.
4d52c563-5acc-4a8d-b8e1-7e8dbcb2edf2
Bending, S.J.
6fc9500c-53af-4abc-9a27-b0c4e4f87712
Van Bael, M.J.
5bdea633-59c0-44a1-a9eb-dddf2ee72ecb
Lange, M.
09bc39bc-5524-4826-8079-22ae450a4965
Moshchalkov, V.V.
c0994341-b76b-4cd7-869a-7be34c14b9b1
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Grigorenko, A.N.
4d52c563-5acc-4a8d-b8e1-7e8dbcb2edf2
Bending, S.J.
6fc9500c-53af-4abc-9a27-b0c4e4f87712
Van Bael, M.J.
5bdea633-59c0-44a1-a9eb-dddf2ee72ecb
Lange, M.
09bc39bc-5524-4826-8079-22ae450a4965
Moshchalkov, V.V.
c0994341-b76b-4cd7-869a-7be34c14b9b1
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d

Grigorenko, A.N., Bending, S.J., Van Bael, M.J., Lange, M., Moshchalkov, V.V., Fangohr, H. and de Groot, P.A.J. (2003) Symmetry locking and commensurate vortex domain formation in periodic pinning arrays. Physical Review Letters, 90 (23), 237001-[4pp]. (doi:10.1103/PhysRevLett.90.237001).

Record type: Article

Abstract

The spontaneous formation of domains of commensurate vortex patterns near rational fractional matching fields of a periodic pinning array has been investigated with high resolution scanning Hall probe microscopy. We show that domain formation is promoted due to the efficient incorporation of mismatched excess vortices and vacancies at the corners of domain walls, which outweighs the energetic cost of creating them. Molecular dynamics simulations with a generic pinning potential reveal that domains are formed only when vortex-vortex interactions are long range.

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Published date: 2003

Identifiers

Local EPrints ID: 22428
URI: https://eprints.soton.ac.uk/id/eprint/22428
ISSN: 0031-9007
PURE UUID: 31cb9421-a6df-4159-89a9-2a87a757da9e

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Date deposited: 24 Mar 2006
Last modified: 25 Jul 2017 16:31

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