TY  - JOUR
AU  - Roesner, Benedikt
AU  - Finizio, Simone
AU  - Koch, Frieder
AU  - Doering, Florian
AU  - Guzenko, Vitaliy A.
AU  - Langer, Manuel
AU  - Kirk, Eugenie
AU  - Watts, Benjamin
AU  - Meyer, Markus
AU  - Loroña Ornelas, Joshua
AU  - Spaeth, Andreas
AU  - Stanescu, Stefan
AU  - Swaraj, Sufal
AU  - Belkhou, Rachid
AU  - Ishikawa, Takashi
AU  - Keller, Thomas F.
AU  - Gross, Boris
AU  - Poggio, Martino
AU  - Fink, Rainer
AU  - Raabe, Joerg
AU  - Kleibert, Armin
AU  - David, Christian
TI  - Soft x-ray microscopy with 7 nm resolution
JO  - Optica
VL  - 7
IS  - 11
SN  - 2334-2536
CY  - Washington, DC
PB  - OSA
M1  - PUBDB-2020-04517
SP  - 1602 - 1608
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000593180100004
DO  - DOI:10.1364/OPTICA.399885
UR  - https://bib-pubdb1.desy.de/record/452125
ER  -