LNS: Laboratory for Neutron Scattering and ImagingThe Laboratory for Neutron Scattering and Imaging (LNS) at the Paul Scherrer Institute is responsible for the scientific exploitation, operation and development of neutron scattering and imaging instruments at the Swiss Spallation Neutron Source (SINQ). The team of 50 senior scientists, postdoctoral researchers and PhD students further collaborates on diverse research projects ranging from modern topics in condensed matter physics and materials science to pressing questions in energy research and health care. read more
PhD, Master, Bachelor or Semester projects at the LNSWe offer students the possibility to do their PhD or educational research in our lab. See Teaching and Education for detailed information on Master/Diploma thesis, Bachelor/Semester work and practical courses at the LNS. Currently we have open positions for
- Semester projects on several topics
- Master project - Discovery of new Skyrmion lattice materials
- Master project - Spontaneous magnon decay in non-collinear antiferromagnets
- Master project - Geometrical magnetic frustration beyond insulating ionic compounds
- Master project - Magnetic order in anisotropic triangular materials
- Master project - Magnetic structure of the quantum trimer compound Cs3Cu3Cl8OH
24. November 2016
Electromagnons probed by inelastic X-ray scattering in LiCrO2S. Tóth et al., Nature Communications 7, 13547 (2016). Lattice vibrations (phonons) in crystals are typically weakly interacting with the electronic and magnetic degrees of freedom, such as charge and spin fluctuations. Researchers of PSI together with collaborators from EPF Lausanne, Japan and USA discovered an unexpectedly strong coupling between lattice vibrations and spin fluctuations in the quantum magnet LiCrO2. The observed magnetoelastic waves or electromagnons carry both electric and magnetic dipole moment. This was proven using complementary studies with non-resonant inelastic X-ray scattering at ESRF and on the EIGER thermal neutron triple-axis-spectrometer at SINQ, PSI. The experimental data together with model calculations revealed the underlying coupling mechanism. These results will help to develop better multiferroic materials and demonstrate that inelastic X-ray scattering can probe magnetism with high energy resolution in special systems in strong spin-lattice coupling.
31. October 2016
Spiral spin-liquid and the emergence of a vortex-like state in MnSc2S4S. Gao et al., Nature Physics (2016). In conventional paramagnets spins fluctuate randomly, which leads to a completely disordered state. This is not the case for spiral spin-liquids, where spins fluctuate as correlated spirals. Recently researchers of LNS together with collaborators from Germany and France experimentally observed the spiral spin-liquid state in MnSc2S4 validating the theoretical prediction made almost 10 years ago by Bergman et al. Besides, an emergent vortex-like triple-q phase was discovered under a magnetic field, establishing the A-site spinels as promising systems to realize the magnetic vortex lattice. This project is a part of a grant on Quantum Frustration in Model Magnets funded by the Swiss National Science Foundation.
26. October 2016
100 Hz neutron radiography at the BOA beamline using a parabolic focussing guideP. Trtik, et al., MethodsX 3, 535 (2016). The recent developments in scientific complementary metal oxide semiconductor (sCMOS) detector technology allow for imaging of relevant processes with very high temporal resolution with practically negligible readout time. However, it is neutron intensity that limits the high temporal resolution neutron imaging. In order to partially overcome the neutron intensity problem for the high temporal resolution imaging, a parabolic neutron focussing guide was utilized in the test arrangement and placed upstream the detector in such a manner that the focal point of the guide was positioned slightly behind the scintillator screen. In such a test arrangement, the neutron flux can be increased locally by about one order of magnitude, albeit with the reduced spatial resolution due to the increased divergence of the neutron beam. In a pilot test application, an in-situ titration system allowing for a remote delivery of well-defined volumes of liquids onto the sample stage was utilized. The process of droplets of water (H2O) falling into the container filled with heavy water (D2O) and the subsequent process of the interaction and mixing of the two liquids were imaged with temporal resolution of 0.01 s.
26. October 2016