3D Spin VLEED System | © Scienta Omicron
DA30-L equipped with 2D version of spin VLEED.
ARPES Lab, DA30-L and VLEED | © Scienta Omicron
Complete spin-ARPES turnkey system with DA30-L, VLEED transfer, and Ferrum detector.
Graphical rendering of the DA30-L Product equipped with 3D Spin VLEED | © Scienta Omicron
DA30-L equipped with 3D Spin VLEED.

3D Spin VLEED

Resolving In- and Out-of-Plane Electron Spin with DA30-L

PESVLEED

  • Proven technology – DA30 deflection mode for full cone ARPES and VLEED spin detection
  • Fixed transfer system with two orthogonal VLEED detectors
  • Easy VLEED target preparation without transfer / realignment
  • Market leading Sherman function and reflectivity
  • Strictly non-magnetic transfer lens

The 3D Spin VLEED utilises the exchange scattering mechanisms to be 50x more efficient than Mott schemes. It is equipped with Ferrum VLEED detectors which mount on a proprietary transfer lens with high speed switching between channels. The DA30-L's unique deflection mode directs any part the full acceptance cone to the spin detectors without sample rotation for detection of in-plane and out-of-plane spin vectors.

The 3D VLEED Spin detector allows resolving the out-of-plane as well as both in-plane spin components. The three spin vector directions are all defined by the geometry in the instrument and without the use of magnetic fields. In each Ferrum VLEED detector from Focus GmbH the target magnetisation gives two orthogonal directions. For the 3D version, two Ferrum detectors are mounted in orthogonal geometry. This ensures that the measured spin vectors are truly orthogonal.

More Information

Combining with DA30-L

Successful spin measurements require high-quality ARPES measurements to verify sample properties and ensure critical sample alignment. ARPES data is collected with the DA30-L 40mm MCP detector included in the VLEED detector system. Furthermore, to increase speed, precision, and keeping the geometry constant throughout the experiment it is beneficial to avoid sample movements when switching from ARPES to spin-resolved measurements. With the DA30-L's unique capability to quickly scan both θx and θy, while providing the highest energy resolution, sample and lens movements are eliminated and spin-resolved spectra can be collected for all points in k-space of the ARPES measurement. Integrating the Ferrum and the DA30-L creates the highest quality and most efficient spin ARPES measurements.

VLEED Detector Technology

The Ferrum detector is a setup based on VLEED scattering for resolving the spin components of electrons. The scattering Fe-film target is prepared in situ with easy handling of W-substrate preparation, Fe-film evaporation, and oxygen dosing. No transfer/realignment of the target is required for regeneration. Successfully prepared, the Fe-scattering film lifetime can reach weeks. This detector is integrated to the DA30-L through a transfer lens.

2D Spin VLEED

The Spin VLEED is available as 2D version which provides detection of two spin vectors, one in-plane and one out-of-plane vector. The 2D Spin VLEED can easily be upgraded at customer site to the 3D Spin VLEED by addition of a second Ferrum detector.

Results

Au(111) data recorded with DA30-L, 2D Ferrum VLEED detector, the VUV5k UV source, and using the analyser deflector capability for ARPES and spin mapping. The complete ARPES data cube was recorded in 10 min and the high resolution spin measurement to the right was recorded in 2 h, all with fixed sample/manipulator position. 

Specifications

Sherman function

S ≥ 28 % (achieved > 30 %)

VLEED detector specifications for the Ferrum detector from Focus GmbH.

For full specifications and more information about product options, please do not hesitate to contact your local sales representative.

Reflectivity (I/I0)

R ≥ 10 % (achieved > 15 %)

Reference systems

ARPES Lab, DA30-L and VLEED | © Scienta Omicron
191113

ARPES Lab with FERRUM Spin-Filter

more
Epitaxial Quantum Materials | © Scienta Omicron
165105

Materials Innovation Platform (MIP) for Epitaxial Quantum Materials

Research focus on controlled synthesis of epitaxial thin films and nanostructures, including: ferroelectrics, strongly correlated oxides, multiferroics, superconductors, thermoelectrics, photovoltaics, oxide catalysts, electronic/ionic conductors, and the characterisation of their functional properties.

more

Downloads

2D/3D Ferrum VLEED Detector for DA30-L

6.02 MB

This 2D or 3D spin detection utilizes the exchange scattering mechanisms to be 50x more efficient than Mott schemes. One or two Ferrum VLEED detectors mount on a proprietary transfer lens with high speed switching between channels. The DA30-L's unique deflection mode directs any part of the full acceptance cone to the spin detectors without sample rotation. Integrating the Ferrum and the DA30-L creates the highest quality and most efficient spin ARPES measurements.