Magnetic anisotropy of 3nm diameter Co nanowires embedded in CeO2/SrTiO3(001): a ferromagnetic resonance study

Author(s)

Schio, P. ^{[1, 2, 3]} ; Barturen, M. ^{[2, 3, 4, 5, 6]} ; Milano, J. ^{[2, 3, 4, 5, 6]} ; Bonilla, F. J. ^{[2, 3, 4]} ; Zheng, Y. ^{[2, 3, 4]} ; Vidal, F. ^{[2, 3, 4]} ; de Oliveira, A. J. A. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Paris 06, Univ Paris 04, UMR 7588, INSP, 4 Pl Jussieu, F-75005 Paris - France

^[3] CNRS, UMR 7588, Inst NanoSci Paris, F-75005 Paris - France

^[4] Lab Int Franco Argentin Nanosci Argentina & Franc, LIFAN, Paris - France

^[5] Consejo Nacl Invest Cient & Tecn, CNEA, San Carlos De Bariloche, Rio Negro - Argentina

^[6] Inst Balseiro, San Carlos De Bariloche, Rio Negro - Argentina

• Document type: Journal article
• Source: MATERIALS RESEARCH EXPRESS; v. 1, n. 3 SEP 2014.
• Web of Science Citations: 4

Abstract

The magnetic anisotropy of 3-nm wide cobalt nanowires embedded in epitaxial CeO2/SrTiO3(001) layers is investigated by ferromagnetic resonance measurements. The measured magnetic shape and the magnetocrystalline anisotropies confirm that the Co nanowires have their main axes perpendicular to the film surface, and they are composed of hcp Co grains with the c-axes oriented along one of the <111> directions of the CeO2 matrix. The effects of such a peculiar structure on the magnetic anisotropy are addressed experimentally. The results show that the magnetic anisotropy of the wires is dominated by the magnetostatic term. The inhomogeneous structure of the wires leads to an effective magnetocrystalline anisotropy smaller than the bulk value of hcp Co. (AU)

• FAPESP's process: 07/08649-5 - Magnetic and electronic properties in semiconducting oxides doped with transition metals
• Grantee: Pedro Schio de Noronha Muniz
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/24025-0 - Magnetic, electrical and magnetostrictive properties of multiferroic composites and dilute magnetic semiconductors oxides
• Grantee: Adilson Jesus Aparecido de Oliveira
• Support Opportunities: Regular Research Grants