TY  - JOUR
AU  - Grillo, Vincenzo
AU  - Harvey, Tyler R.
AU  - Venturi, Federico
AU  - Pierce, Jordan S.
AU  - Balboni, Roberto
AU  - Bouchard, Frédéric
AU  - Carlo Gazzadi, Gian
AU  - Frabboni, Stefano
AU  - Tavabi, Amir H.
AU  - Li, Zi-An
AU  - Boyd, Robert W.
AU  - McMorran, Benjamin J.
AU  - Karimi, Ebrahim
AU  - Dunin-Borkowski, Rafal
TI  - Observation of nanoscale magnetic fields using twisted electron beams
JO  - Nature Communications
VL  - 8
IS  - 1
SN  - 2041-1723
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2017-07582
SP  - 689
PY  - 2017
AB  - Electron waves give an unprecedented enhancement to the field of microscopy by providing higher resolving power compared to their optical counterpart. Further information about a specimen, such as electric and magnetic features, can be revealed in electron microscopy because electrons possess both a magnetic moment and charge. In-plane magnetic structures in materials can be studied experimentally using the effect of the Lorentz force. On the other hand, full mapping of the magnetic field has hitherto remained challenging. Here we measure a nanoscale out-of-plane magnetic field by interfering a highly twisted electron vortex beam with a reference wave. We implement a recently developed holographic technique to manipulate the electron wavefunction, which gives free electrons an additional unbounded quantized magnetic moment along their propagation direction. Our finding demonstrates that full reconstruction of all three components of nanoscale magnetic fields is possible without tilting the specimen.
LB  - PUB:(DE-HGF)16
C6  - pmid:28947803
UR  - <Go to ISI:>//WOS:000411646700011
DO  - DOI:10.1038/s41467-017-00829-5
UR  - https://juser.fz-juelich.de/record/840012
ER  -