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