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Publications::
O'Shea, Kerry J.; MacLaren, Donald A.; McGrouther, Damien; Schwarzbach, Danny; Jungbauer, Markus; Hühn, Sebastian; Moshnyaga, Vasily; Stamps,Robert L. Nanoscale Mapping of the Magnetic Properties of (111)-Oriented La0.67Sr0.33MnO3 Nano Letters 15 (2015), 5868-5874 Spatially resolved analysis of magnetic properties on
the nanoscale remains challenging, yet strain and defects on this
length-scale can profoundly affect a material’s bulk performance. We
present a detailed investigation of the magnetic properties of
La0.67Sr0.33MnO3 thin films in both free-standing and nanowire form
and assess the role of strain and local defects in modifying the films’
magnetic properties. Lorentz transmission electron microscopy is
used to measure the magnetocrystalline anisotropy and to map the Curie temperature and saturation magnetization with
nanometric spatial resolution. Atomic-scale defects are identified as pinning sites for magnetic domain wall propagation.
Measurement of domain wall widths and crystalline strain are used to identify a strong magnetoelastic contribution to the
magnetic anisotropy. Together, these results provide unique insight into the relationship between the nanostructure and
magnetic functionality of a ferromagnetic complex oxide film. View/Download |
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