Vortex circulation patterns in planar microdisk arrays

Velten, Sven; Streubel, Robert; Farhan, Alan; Kent, Noah; Im, Mi-Young; Scholl, Andreas; Dhuey, Scott; Behncke, Carolin; Meier, Guido; Fischer, Peter

doi:10.1063/1.4990990

Title: Vortex circulation patterns in planar microdisk arrays

Journal Article · 26 June 2017 · Applied Physics Letters

DOI: https://doi.org/10.1063/1.4990990 · OSTI ID:1439220

Velten, Sven ^[1]; Streubel, Robert ^[2];

^[2]; Kent, Noah ^[3]; Im, Mi-Young ^[4]; Scholl, Andreas ^[2]; Dhuey, Scott ^[2]; Behncke, Carolin ^[5]; Meier, Guido ^[6]; Fischer, Peter ^[3]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Hamburg (Germany)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Daegu Gyeongbuk Inst. of Science and Technology, Daegu (South Korea, Republic of)
Univ. of Hamburg (Germany)
Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)

We report a magnetic X-ray microscopy study of the pattern formation of circulation in arrays of magnetic vortices ordered in a hexagonal and a honeycomb lattice. In the honeycomb lattice, we observe at remanence an ordered phase of alternating circulations, whereas in the hexagonal lattice, small regions of alternating lines form. A variation in the edge-to-edge distance shows that the size of those regions scales with the magnetostatic interaction. Micromagnetic simulations reveal that the patterns result from the formation of flux closure states during the nucleation process.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE

Grant/Contract Number:: AC02-05CH11231; AC02-05- CH11231; AC02-05-CH11231

OSTI ID:: 1439220

Alternate ID(s):: OSTI ID: 1371495

Journal Information:: Applied Physics Letters, Vol. 110, Issue 26; Related Information: © 2017 Author(s).; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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Advances in artificial spin ice Skjærvø, Sandra H.; Marrows, Christopher H.; Stamps, Robert L. Nature Reviews Physics, Vol. 2, Issue 1 https://doi.org/10.1038/s42254-019-0118-3	journal	November 2019
Phase diagram of dipolar-coupled XY moments on disordered square lattices Schildknecht, Dominik; Heyderman, Laura J.; Derlet, Peter M. Physical Review B, Vol. 98, Issue 6 https://doi.org/10.1103/physrevb.98.064420	journal	August 2018
Tunable geometrical frustration in magnonic vortex crystals Behncke, Carolin; Adolff, Christian F.; Wintz, Sebastian Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-017-17480-1	journal	January 2018