Small sample measurements at the low energy muon facility of Paul Scherrer Institute

Abstract

The low energy muon spin rotation spectroscopy (LE-$\mu$SR) is primarily used to investigate thin films, surfaces, and interfaces of materials, which has matured at the Paul Scherrer Institute (PSI) and is routinely employed by users of the low energy muon (LEM) facility. However, because of the large beam spot and low implanted muons rate, LE-$\mu$SR measurements on small samples are difficult, requiring an optimal sample size of $25\times 25$ mm${}^2$. Recently, we have boosted our ability to measure small samples, down to $5\times 5$ mm${}^2$ area, by beam collimation and tuning. This achievement is crucial for the measurements of many magnetic and superconducting materials. Furthermore, we have devised a method that allows us to measure five small area samples mounted together on the same sample plate. We expect this method to further improve the efficient use of beam time at LEM.

References in corpus (6)

• Intrinsic magnetism in superconducting infinite-layer nickelates
• Target Studies for Surface Muon Production
• Direct spectroscopic observation of a shallow hydrogen-like donor state in insulating SrTiO${}_3$
• Science Case for the new High-Intensity Muon Beams HIMB at PSI
• Geant4 simulation of the PSI LEM beam line: energy loss and muonium formation in thin foils and the impact of unmoderated muons on the $\mu$SR spectrometer
• A segmented conical electric lens for optimization of the beam spot of the low-energy muon facility at PSI: a Geant4 simulation analysis

Cited by in corpus (3)

• Improving the low-energy muon beam quality of the LEM beamline at PSI: Characterisation of ultra-thin carbon foils
• Surface-Localized Magnetic Order in RuO2 Thin Films Revealed by Low-Energy Muon Probes
• Correcting the Energy-Dependent Asymmetry in Low-Energy $\mu$SR