Abstract
While magnetic nanowires generally have a preferential magnetization direction along the wire axis to
minimize magnetostatic energy, it is shown here for epitaxial magnetic oxide nanowires that substrate-induced
strain can be used to tailor the magnetic easy axis in any direction. La0.67Sr0.33MnO3 (LSMO) nanowires were
prepared by pulsed laser deposition of LSMO thin films on NdGaO3 (NGO) substrates of two different
orientations [NGO(110)o and NGO(010)o], followed by patterning into arrays of nanowires by laser interference
lithography. The uniaxial compressive strain from the substrate induces a strong uniaxial magnetic
anisotropy in the LSMO that dominates the anisotropy. Hence, one obtains LSMO nanowires having a magnetic
easy axis that can lie in any direction, including perpendicular to the wire axis. In marked contrast, similar
nanowires on SrTiO3(001) substrates without significant uniaxial strain exhibit the usual preferential magnetization
direction along the wire axis, as dictated by magnetostatic shape anisotropy. The tunable magnetic
anisotropy direction is a useful feature for applications of magnetic nanowires in magnetic memory, sensor, and
logic devices.
12jan2010: door HansG ingevuld: 1098-0121
Original language | English |
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Pages (from-to) | 064408 |
Number of pages | 7 |
Journal | Physical review B: Condensed matter and materials physics |
Volume | 80 |
Issue number | 064408 |
DOIs | |
Publication status | Published - 14 Aug 2009 |
Keywords
- EWI-16451
- METIS-264121
- IR-69068