Magnetic vortex crystal formation in the antidot complement of square artificial spin ice

Journal Article · Mon Mar 03 04:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4867530· OSTI ID:22283075

Silva, R. C.; Ribeiro, I. R. B.; Nascimento, F. S.; Felix, J. F.; Ferreira, S. O.; Moura-Melo, W. A.; Pereira, A. R. ^[1]; Mól, L. A. S. ^[2]

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1. Departamento de Física, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais (Brazil)
2. Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais (Brazil)

We have studied ferromagnetic nickel thin films patterned with square lattices of elongated antidots that are negative analogues of square artificial spin ice. Micromagnetic simulations and direct current magnetic moment measurements reveal in-plane anisotropy of the magnetic hysteresis loops, and the formation of a dense array of magnetic vortices with random polarization and chirality. These multiply-connected antidot arrays could be superior to lattices of disconnected nanodisks for investigations of vortex switching by applied electric current.

• OSTI ID: 22283075
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 9 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CHIRALITY
CRYSTALS
DIRECT CURRENT
FERROMAGNETISM
HYSTERESIS
MAGNETIC FLUX
MAGNETIC MOMENTS
NICKEL
POLARIZATION
RANDOMNESS
SIMULATION
SPIN
TETRAGONAL LATTICES
THIN FILMS
VORTICES