Neutron spectroscopy is a powerful tool to study magnetic excitations arising from correlation effects of electrons. Less well known is that neutrons can also be used to investigate directly electronic band structures in strongly correlated metallic quantum matter(1). Neutrons scatter electrons form occupied to unoccupied states with a probability given by the so-called Lindhard...
Conventional neutron spin echo (NSE) is an ultra - high energy resolution technique, offering energy resolutions down to <1 neV [1]. However, classical NSE is limited in the range of high energy transfers, reaching an energy resolution of 0.2 meV at best.
Longitudinal neutron resonant spin echo (LNRSE) and longitudinal modulation of intensity with zero effort (LMIEZE) are able to overcome this...
The application of high magnetic fields is a powerful method for revealing the complex behavior in modern materials. In combination with microscopic probe such as neutrons it provides a direct access to static and dynamic correlations in matter. Helmholtz-Zentrum Berlin (HZB) hosts a unique high field facility for neutron scattering. The facility combines neutron scattering with continuous...
The results of two research studies on the development of the “Next generation horizontal SANS magnet (NHSM) for quantum phenomena in nanostructures and correlated electron systems” are presented. The NHSM project is a high performance compensated 12T horizontal magnet optimized for small angle neutron scattering (SANS), reflectometry and the resonance spin echo technique MIEZE (Modulation of...
Inelastic neutron scattering (INS) and electron spin resonance (ESR) are two of key spectroscopy techniques, complementing each other and widely employed to study the spin dynamics in strongly correlated electron systems. While ESR is limited to magnetic excitations at Gamma-point, INS can nominally probe the spin dynamics within the whole Brillouin zone. On the other hand, the challenges...
Neutron depth profiling (NDP) is a non-destructive nuclear analytical technique. It uses charged particles produced in neutron capture reactions for material analysis. This is done by measuring the energy loss of these particles in a sample and determining the production depth through this energy loss. Thereby a depth profile can be measured.
The N4DP instrument is a new experimental setup...
Neutron spin echo (NSE) spectroscopy provides the ultimate energy resolution in quasi-elastic thermal and cold neutron scattering spectroscopy. In 2017 the Jülich neutron spin echo at MLZ went through a refurbishment of the secondary spectrometer: The old normal conducting main-precession coils have been replaced by a new set of fringe-field compensated, superconducting magnets that were...
