On the magnetic properties of iron nanostructures fabricated via focused electron beam induced deposition and autocatalytic growth processes

Journal article


Publication Details

Author(s): TU F, Drost M, Vollnhals F, Späth A, Carrasco E, Fink R, Marbach H
Journal: Nanotechnology
Publication year: 2016
Volume: 27
ISSN: 1361-6528


Abstract

We employ Electron beam induced deposition (EBID) in combination with autocatalytic growth (AG) processes to fabricate magnetic nanostructures with controllable shapes and thicknesses. Following this route, different Fe deposits were prepared on silicon nitride membranes under ultra-high vacuum conditions and studied by scanning electron microscopy (SEM) and scanning transmission x-ray microspectroscopy (STXM). The originally deposited Fe nanostructures are composed of pure iron, especially when fabricated via autocatalytic growth processes. Quantitative near-edge x-ray absorption fine structure (NEXAFS) spectroscopy was employed to derive information on the thickness dependent composition. X-ray magnetic circular dichroism (XMCD) in STXM was used to derive the magnetic properties of the EBID prepared structures. STXM and XMCD analysis evinces the existence of a thin iron oxide layer at the deposit-vacuum interface, which is formed during exposure to ambient conditions. We were able to extract magnetic hysteresis loops for individual deposits from XMCD micrographs with varying external magnetic field. Within the investigated thickness range (2-16 nm), the magnetic coercivity, as evaluated from the width of the hysteresis loops, increases with deposit thickness and reaches a maximum value of $∼$160 Oe at around 10 nm. In summary, we present a viable technique to fabricate ferromagnetic nanostructures in a controllable way and gain detailed insight into their chemical and magnetic properties.


FAU Authors / FAU Editors

Drost, Martin
Lehrstuhl für Physikalische Chemie II
Fink, Rainer Prof. Dr.
Professur für Physikalische Chemie
Marbach, Hubertus PD Dr.
Lehrstuhl für Physikalische Chemie II
Späth, Andreas Dr.
Lehrstuhl für Physikalische Chemie II
TU, Fan
Lehrstuhl für Physikalische Chemie II
Vollnhals, Florian Dr.
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC)


Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials
B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
TU, F., Drost, M., Vollnhals, F., Späth, A., Carrasco, E., Fink, R., & Marbach, H. (2016). On the magnetic properties of iron nanostructures fabricated via focused electron beam induced deposition and autocatalytic growth processes. Nanotechnology, 27. https://dx.doi.org/10.1088/0957-4484/27/35/355302

MLA:
TU, Fan, et al. "On the magnetic properties of iron nanostructures fabricated via focused electron beam induced deposition and autocatalytic growth processes." Nanotechnology 27 (2016).

BibTeX: 

Last updated on 2019-25-03 at 09:23