Strain-induced magnetization reorientation in epitaxial Cu/Ni/Cu rings
Author(s)
Corredor, E. C.; Coffey, D.; Ciria, M.; Arnaudas, J. I.; Aisa, J.; Ross, Caroline A.; ... Show more Show less
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The role of the strain state in epitaxial (001)-oriented Cu/Ni(14 nm)/Cu rings is investigated using a combination of magnetic force microscopy and finite-element calculations. Rings with an external diameter of 3 and 2 μm and linewidth W larger than 400 nm show two different structures: domains with magnetization oriented in the radial direction exist at the inner and outer radius, separated by an area in the interior of the ring consisting of stripe domains with perpendicular magnetization. The former is the sole magnetic structure observed for W < 400 nm. Micromagnetic calculations on narrow-linewidth structures indicate that the radial domain-wall structure consists of elliptical Bloch lines with a shorter and longer length along the tangential and radial directions, respectively. Finite-element calculations show that the anisotropic relaxation of the in-plane strain is larger at the ring inner and outer edges than in the interior part of the ring and accounts for the reorientation of the magnetization direction.
Date issued
2013-08Department
Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Physical Review B
Publisher
American Physical Society
Citation
Corredor, E. C., D. Coffey, M. Ciria, J. I. Arnaudas, J. Aisa, and C. A. Ross. “Strain-Induced Magnetization Reorientation in Epitaxial Cu/Ni/Cu Rings.” Phys. Rev. B 88, no. 5 (August 2013). © 2013 American Physical Society
Version: Final published version
ISSN
1098-0121
1550-235X