Vortex chirality in an array of ferromagnetic dots.

Journal Article · Wed May 01 00:00:00 EDT 2002 · Phys. Rev. B

DOI:https://doi.org/10.1103/PhysRevB.65.172419· OSTI ID:949635

Grimsditch, M; Vavassori, P; Novosad, V; Metlushko, V; Shima, H; Otani, Y; Fukamichi, K

Magnetization of an array of submicron permalloy dots was investigated using the diffracted magneto-optical Kerr effect. The shapes of the higher-order hysteresis loops are explained by the magnetic form factors associated with a vortex spin structure in each disk. The imaginary part of the form factor also explains the unexpected measured differences between hysteresis loops obtained on positive and negative diffraction orders. Shape effects account for the coherent chirality of the vortices over the array.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); FOR
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 949635
• Report Number(s): ANL/MSD/JA-42752; PRBMDO; TRN: US201012%%418
• Journal Information: Phys. Rev. B, Vol. 65, Issue May 1, 2002; ISSN 0163-1829
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
CHIRALITY
DIFFRACTION
FORM FACTORS
HYSTERESIS
KERR EFFECT
MAGNETIZATION
PERMALLOY
SHAPE
SPIN
VORTICES