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Surfaces / Interfaces: Microscopy (SIM) Beamline

The SIM beamline produces a high flux of soft X-rays with variable polarization from an undulator source. The beamline has a Photo-Emission Electron Microscope (PEEM) (Model: LEEM III, Elmitec GmbH) as a permanent endstation open to user via the SLS proposals system. The instrument allows to image samples using the photoelectric effect with very high spatial resolution (100 nm), chemical and magnetic sensitivity. With an energy analyzer the excited photoelectrons can be energy-selected. In addition to illumination by X-rays, illumination by low energy electrons is possible. In this low energy electron microscopy (LEEM) mode additional contrast mechanisms are available.

The PEEM is equipped with a small preparation chamber (sputtering, heating, load-lock). In addition, a more complete preparation system is available with a load-lock, LEED and Auger, several evaporation sources, rotatable electromagnetic coil, ion etching and electron bombardment heating.

Users can apply for beamtime with the PEEM or with their own endstation (after prior consulation with the beamline scientist).

The SIM beamline is operated by the Microscopy and Magnetism Group.

Energy range 90-2000 eV
Flux (1 keV) 1 x 1015 photons/s/0.1%BW/ 0.4 A
Focused spot size 30 µm x 100 µm (V x H)
Spectral resolution > 5000
Polarization Linear: 0o (horizontal) to 90o (vertical)
Circular: right / left
Endstation ES1 Photo-emission electron microscope with spatial resolution = 70 nm, variable sample temperature: 100 - 1'800 K.
Endstation ES3 XMCD chamber for total electron yield (TEY) measurements in applied field (130 mT) and variable sample temperature (5 - 450 K).
Endstation ES4 Resonant x-ray scattering (RESOXS) and near ambient pressure photo-emission (NAPP). These endstations belong to user groups and can only be used in collaboration with them.

Current Highlights and News

9 January 2023
Unusual ferrimagnetism

Unusual ferrimagnetism in CaFe2O4

Rare ferrimagnet states in a phase competing antiferromagnet.

Read more
4 April 2022
Blick in die magnetische Zukunft

A look into the magnetic future

Media Releases Research Using Synchrotron Light Materials Research

PSI researchers are the first to observe a specific behaviour of magnetic ice.

Read more
9 March 2022
Layered crystal structure

Exchange scaling of ultrafast angular momentum transfer in 4f antiferromagnets

A novel approach to controlling the speed of magnetic processes has been found through resonant magnetic scattering in an antiferromagnetic Lanthanide intermetallics.

Read more

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