https://doi.org/10.1140/epjb/e2013-30935-4
Regular Article
Transverse magnetization in Cu/Ni/Cu epitaxial nanorings*
1 Instituto de Ciencia de Materiales de
Aragón, Consejo Superior de
Investigaciones Científicas, 50009
Zaragoza,
Spain
2 Laboratorio de Microscopías
Avanzadas, Instituto de Nanociencia de Aragón, Universidad de Zaragoza,
50018
Zaragoza,
Spain
3 Departamento de Física de la Materia
Condensada, Universidad de Zaragoza, 50009
Zaragoza,
Spain
4 Department of Materials Science and
Engineering, Massachusetts Institute of Technology, Cambridge
MA
02139-4307,
USA
a
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
12
October
2012
Received in final form:
10
January
2013
Published online:
8
April
2013
Abstract
The micromagnetic structure in epitaxial (001)-oriented Cu/Ni(14 nm)/Cu rings fabricated by electron beam and focused ion beam lithographies with external diameter of 3 μm and linewidths between 100 and 500 nm is presented. We found that a state with radial orientation of the magnetization prevails at remanence. The evaluation of the magnetoelastic, magnetocrystalline and magnetostatic energies shows that a value as low as 1.5 × 10-3 for the anisotropic relaxation of the in-plane strain components is enough to induce an effective radial easy magnetization direction.
Contribution to the Topical Issue “New Trends in Magnetism and Magnetic Materials”, edited by Francesca Casoli, Massimo Solzi and Paola Tiberto.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013
