Size effects in ordered arrays of magnetic nanotubes: Pick your reversal mode

Bachmann, J.; Escrig, J; Pitzschel, K; Moreno, JMM; Jing, J.; Gorlitz, D; Altbir, D.; Nielsch, K.

Abstract

Ordered arrays of magnetic nanotubes are prepared by combining a porous template (anodic alumina) with a self-limiting gas-solid chemical reaction (atomic layer deposition). The geometric parameters can thus be tuned accurately (tube length of 1-50 µm, diameter of 20-150 nm, and wall thickness of 1-40 nm), which enables one to systematically study how confinement and anisotropy effects affect the magnetic properties. In particular, the wall thickness of such ordered Fe3 O4 nanotubes has a nonmonotonic influence on their coercive field. Theoretical models reproduce the size effects that are experimentally observed and interpret them as originating from a crossover between two distinct modes of magnetization reversal. © 2009 American Institute of Physics.

Más información

Título según WOS: Size effects in ordered arrays of magnetic nanotubes: Pick your reversal mode
Título según SCOPUS: Size effects in ordered arrays of magnetic nanotubes: Pick your reversal mode
Título de la Revista: JOURNAL OF APPLIED PHYSICS
Volumen: 105
Número: 7
Editorial: AMER INST PHYSICS
Fecha de publicación: 2009
Idioma: English
URL: http://scitation.aip.org/content/aip/journal/jap/105/7/10.1063/1.3074109
DOI:

10.1063/1.3074109

Notas: ISI, SCOPUS