%0 Journal Article
%A Roesner, Benedikt
%A Finizio, Simone
%A Koch, Frieder
%A Doering, Florian
%A Guzenko, Vitaliy A.
%A Langer, Manuel
%A Kirk, Eugenie
%A Watts, Benjamin
%A Meyer, Markus
%A Loroña Ornelas, Joshua
%A Spaeth, Andreas
%A Stanescu, Stefan
%A Swaraj, Sufal
%A Belkhou, Rachid
%A Ishikawa, Takashi
%A Keller, Thomas F.
%A Gross, Boris
%A Poggio, Martino
%A Fink, Rainer
%A Raabe, Joerg
%A Kleibert, Armin
%A David, Christian
%T Soft x-ray microscopy with 7 nm resolution
%J Optica
%V 7
%N 11
%@ 2334-2536
%C Washington, DC
%I OSA
%M PUBDB-2020-04517
%P 1602 - 1608
%D 2020
%X The availability of intense soft x-ray beams with tunable energy and polarization has pushed the development of highlysensitive, element-specific, and noninvasive microscopy techniques to investigate condensed matter with high spatialand temporal resolution. The short wavelengths of soft x-rays promise to reach spatial resolutions in the deep single-digitnanometer regime, providing unprecedented access to magnetic phenomena at fundamental length scales. Despiteconsiderable efforts in soft x-ray microscopy techniques, a two-dimensional resolution of 10 nm has not yet been surpassedin direct imaging. Here, we report on a significant step beyond this long-standing limit by combining newlydeveloped soft x-ray Fresnel zone plate lenses with advanced precision in scanning control and careful optical design.With this approach, we achieve an image resolution of 7 nm. By combining this highly precise microscopy techniquewith the x-ray magnetic circular dichroism effect,we reveal dimensionality effects in an ensemble of interacting magneticnanoparticles. Such effects are topical in current nanomagnetism research and highlight the opportunities of highresolutionsoft x-ray microscopy in magnetism research and beyond.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000593180100004
%R 10.1364/OPTICA.399885
%U https://bib-pubdb1.desy.de/record/452125