Ion-beam induced fcc-bcc transition in ultrathin Fe films for ferromagnetic patterning

Ar + ion irradiation is used to induce a structural change from fcc to bcc in a 1.5nm thick Fe film epitaxially grown on a Cu(100) crystal. Scanning tunneling microscopy and low-energy electron diffraction show the nucleation of bcc nanocrystals, which grow with increasing ion dose. As a consequence...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2008-08, Vol.93 (6)
Main Authors: Rupp, W., Biedermann, A., Kamenik, B., Ritter, R., Klein, Ch, Platzgummer, E., Schmid, M., Varga, P.
Format: Article
Language:English
Subjects:
ARGON IONS
BCC LATTICES
ELECTRON DIFFRACTION
EPITAXY
FCC LATTICES
FERROMAGNETIC MATERIALS
ION BEAMS
IRON
IRRADIATION
LAYERS
MATERIALS SCIENCE
NANOSTRUCTURES
NUCLEATION
PHASE TRANSFORMATIONS
SCANNING ELECTRON MICROSCOPY
SCANNING TUNNELING MICROSCOPY
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ar + ion irradiation is used to induce a structural change from fcc to bcc in a 1.5nm thick Fe film epitaxially grown on a Cu(100) crystal. Scanning tunneling microscopy and low-energy electron diffraction show the nucleation of bcc nanocrystals, which grow with increasing ion dose. As a consequence of the structural change, the irradiated iron film becomes strongly ferromagnetic at room temperature. We present a model for the process of the transformation and demonstrate writing a magnetic pattern at the 100nm scale by ion-beam projection lithography.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2969795