INVESTIGADORES
BERCOFF Paula Gabriela
artículos
Título:
Enhanced in-plane magnetic anisotropy in thermally treated arrays of Co-Pt nanowires
Autor/es:
F. MENESES; C. BRAN; M. VÁZQUEZ; P. G. BERCOFF
Revista:
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2020
ISSN:
0921-5107
Resumen:
Ordered arrays of CoxPt100-x cylindrical nanowires (NWs) with x=90, 80, 70 were synthesized by template-assisted electrodeposition using nanoporous alumina membranes of 55nm pore diameter. The obtained NWs alloys crystallize in hcp and/or fcc structures, depending on the composition and thermal treatment,resulting in different magnetic behaviors. The magnetic anisotropy was studied as a function of composition and crystalline structure in as-deposited and annealed samples. An enhanced coercivity was obtained for the Co70Pt30 NWs array, in which in-plane anisotropy (e.g., perpendicular to the NWs axis) was found.These characteristics have not been reported for NWs of this kind. A simplified model of effective anisotropy including shape, magnetostatic interaction and magnetocrystalline contributions is presented, which appropriately describes the magnetic behavior of the CoxPt100-x NWs arrays before and after annealing.
