Artículo
Wave reversal mode: A new magnetization reversal mechanism in magnetic nanotubes
Raviolo, Sofia
; Arciniegas Jaimes, Diana Marcela
; Bajales Luna, Noelia
; Escrig Murúa, Juan Eduardo
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
03/2020
Editorial:
Elsevier Science
Revista:
Journal of Magnetism and Magnetic Materials
ISSN:
0304-8853
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We have investigated the magnetic properties of 14 nm thick and 1 μm long nickel and permalloy nanotubes with external diameters of 40 and 100 nm as a function of the angle θ at which the external magnetic field is applied. Our results show that the coercivity of 40 nm diameter nickel nanotubes follows a non-monotonic behavior from θ = 0° up to θ = 60°, while that corresponding to permalloy displays an increasing monotonic trend at the same angular range. At θ = 90°, both materials evidence a sharp drop of the coercivity to zero, indicating that the reversal mechanism has changed to a pseudo-coherent rotation. On the other hand, nickel and permalloy nanotubes with 100 nm in diameter exhibit a similar angular dependence of the coercivity, reversing their magnetization through the nucleation and propagation of vortex domain walls for angles lower than 75°. For θ = 90°, a novel striking mechanism, the wave reversal mode (W), arises. This phenomenon leads to an unusual S-type shape in the hysteresis curves at those given parameters, which is until now an effect that has not been reported for these nanostructures.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Citación
Raviolo, Sofia; Arciniegas Jaimes, Diana Marcela; Bajales Luna, Noelia; Escrig Murúa, Juan Eduardo; Wave reversal mode: A new magnetization reversal mechanism in magnetic nanotubes; Elsevier Science; Journal of Magnetism and Magnetic Materials; 497; 3-2020; 165944
Compartir
Altmétricas