Advanced Photon Source

An Office of Science National User Facility

Beamline 4-ID-C

Recent Research Highlights

Researchers used XAS/XMCD measurements at 4-ID-C to probe the interface between a topological insulator and a magnetic materials with an eye at enabling advanced electronic devices including quantum computing.
4-ID-C
Researchers used x-ray photoemission spectroscopy (XPS) at beamline 4-ID-C to show that electrons that are spin-polarized by traversing chiral DNA can lead to chiral selective chemistry. This is manifested in an imbalance in the production of L and R enantiometers of model chiral compounds adsorbed into a self assembled monoloayer of DNA on a gold substrate. The results could explain the chiral preference in pre-biological molecules on the early Earth.
4-ID-C
Tiny, disordered particles of magnesium chromium oxide may hold the key to new magnesium battery energy storage technology, which could possess increased capacity compared to conventional lithium-ion batteries, find researchers who studied the material utilizing ultra-bright x-ray beams from the U.S. Department of Energy’s Advanced Photon Source.
4-ID-C, 10-BM-A,B, 11-ID-B
Researchers used single crystal XMCD measurements at beamlines 4-ID-C and 4-ID-D to show presence of itinerant ferromagnetism (Tc ~ 100 K) in the As 4p band of K-doped BaMn2As2 which is not associated with an underlying collinear AFM order of the Mn sublattice. The proximity of magnetic and superconducting phases in these materials provided motivation for these studies.
4-ID-C, 4-ID-D

Beamline 4-ID-C is operated by the Magnetic Materials Group in the X-ray Science Division (XSD) of the Advanced Photon Source.

Research on this beamline focuses on the study of magnetic properties of interfaces and dilute systems using x-ray spectroscopy techniques at energies between 400 to 2500 eV.  A brief description of the beamline and its instruments may be found on the Instrumentation page.  More detailed information is contained in the beamline manual.  To view the current status of the beamline go here.

Local Contacts
David Keavney (XMCD, X-PEEM)     630.252.7893   keavney@aps.anl.gov
Richard A. Rosenberg (XPS, XEOL)     630.252.6112   rar@aps.anl.gov
John Freeland (XMCD, XRMS)     630.252.9614   freeland@anl.gov