Strain-induced magnetization reorientation in epitaxial Cu/Ni/Cu rings

Corredor, E. C. ; Coffey, D. ; Ciria, M. (Universidad de Zaragoza) ; Arnaudas, J. I. (Universidad de Zaragoza) ; Aisa, J. (Universidad de Zaragoza) ; Ross, C. A.

Resumen: 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 andouteredgesthanintheinteriorpartoftheringandaccountsforthereorientation of the magnetization direction.

Idioma: Inglés

DOI: 10.1103/PhysRevB.88.054418

Año: 2013

Publicado en: Physical review. B, Condensed matter and materials physics 88, 5 (2013), 054418 [9 pp.]
ISSN: 1098-0121

Factor impacto JCR: 3.664 (2013)

Categ. JCR: PHYSICS, CONDENSED MATTER rank: 14 / 67 = 0.209 (2013) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/DGA/E81
Financiación: info:eu-repo/grantAgreement/ES/DGA/PI049-08
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2009-10040

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Mecánica (Dpto. Ingeniería Mecánica)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)