Morphological and magnetic analysis of Fe nanostructures on W(110) by using scanning tunneling microscopy and Lorentz microscopy

作者：Schaefer Erik D; Chernov Sergey V; Sapozhnik Alexey A; Kostyuk Dmytro M; Zaporozhchenko Anna V; Protsenko Serhiy I; Bode Matthias; Nepijko Sergej A^*; Elmers Hans Joachim; Schoenhense Gerd

来源：Japanese Journal of Applied Physics, 2016, 55(2): 02BC11.

DOI：10.7567/JJAP.55.02BC11

We investigated morphological features and magnetic properties. of epitaxial Fe nanostructures (films, stripes and nanopaiticles) on a W(110) surface with monoatonlic steps preferentially along the [110] direction, The nanostructures were prepared in ultra-high vacuuni by using electron beam evaporation and subsequent annealing at,different temperatures Scanning tunneling microscopy measurements in-situ revealed elongated Fe nanostructures with aspect ratios of up to 1 : 20. The observable shape and orientation! (along or perpendicular to the monoatomic steps of the substrate) of the nanostructures depended substantially on the preparation parameters, By capping the system with 7 monolayers of Pt, the magnetic properties. of selected Fe nanostructures could be analyzed ex-situ using Lorentz microscopy revealing diversified results, Depending on the size and shape, different magnetization structures, such as single domain, two domains and vortex, were observed.

• 出版日期2016-2