Magnetic interactions and reversal of artificial square spin ices.

Journal Article · Sun Jul 01 00:00:00 EDT 2012 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/14/7/075028· OSTI ID:1050178

Phatak, C; Pan, M; Petford-Long, A K; Hong, S; De Graef, M ^[1]

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1. Center for Nanoscale Materials

Artificial spin ices are nanoscale geometrically engineered systems that mimic the behavior of bulk spin ices at room temperature. We describe the nanoscale magnetic interactions in a square spin ice lattice by an experimentally verified model that accounts for the correct shape of the magnetic islands. Magnetic force microscopy measurements on lithographically fabricated lattices are compared to Monte Carlo simulations of the reversal process of two lattices with different lattice spacings. Lattice node statistics and correlations show significant differences in the reversal mechanism for lattices with different spacings. The effect of structural variations is also compared for the two lattice reversals.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1050178
• Report Number(s): ANL/MSD/JA-72090; TRN: US201218%%531
• Journal Information: New Journal of Physics, Vol. 14, Issue Jul 2012; ISSN 1367-2630
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC FORCE MICROSCOPY
MAGNETIC FIELDS
MAGNETIC ISLANDS
SHAPE
SPIN
STATISTICS