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Mr Victor Alexis Poree (PSI - Paul Scherrer Institut)6/30/22, 2:15 PMSwiss Neutron Science on the European ScaleTalk
The identification of mechanisms to stabilise quantum spin liquids phases is of prime interest. In non-Kramers pyrochlores, transverse fields were proposed as a possible route to promote quantum fluctuations in spin ices.
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Such physics was also proposed to be at work in Tb$_{2}$Hf$_{2}$O$_{7}$, where experimental investigations have revealed the stabilisation of a spin liquid state despite a... -
Charles Mielke III (Paul Scherrer Institut)6/30/22, 2:30 PMSwiss Neutron Science on the European ScaleTalk
We explore magnetic correlations in the recently identified topological kagome system TbMn$_{6}$Sn$_{6}$ using $\mu$SR, combined with local field analysis and neutron diffraction. Our studies identify an out-of-plane ferrimagnetic structure with slow magnetic fluctuations which exhibit a critical slowing down below T$^{*}_{C1}\simeq$ 120 K and freeze into quasi-static patches with ideal...
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Gediminas Simutis6/30/22, 2:45 PMSwiss Neutron Science on the European ScaleTalk
In La-based cuprate superconductors, doped charges are concentrated along domain walls between antiferromagnetic regions in the proposed stripe phase [1]. However, pinpointing the exact nature of this state is challenging as charge and spin density waves are always observed in a multidomain configuration.
Recently, uniaxial pressure was shown to detwin the charge density wave order into a...
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Soohyeon Shin (Paul Scherrer Institut)6/30/22, 3:00 PMSwiss Neutron Science on the European ScaleTalk
CeAuGe exhibits a ferromagnetic ordering below 10.2 K. Cu-doping in the Au site suppresses the unit cell volume, and the inversion symmetry is recovered from 50 % doped CeAuGe, while the ferromagnetic transition temperature remains similar. Neutron experiments reveal that magnetic structures of all Cu-doped CeAuGe compounds are collinear in-plane ferromagnetic. The resistivity of CeAuGe...
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Camilla Buhl Larsen (Paul Scherrer Institute)6/30/22, 3:15 PMSwiss Neutron Science on the European ScaleTalk
Kagome antiferromagnets are well-established model systems in theoretical condensed matter research. Experimental verification of theoretical solutions is, however, lacking, as real systems obeying strict conditions of the ideal Kagome lattice are sparse. In the RAgGe family of compounds, frustrated magnetism is induced by the distorted Kagome arrangement of the rare earth R$^{+3}$ ions,...
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Amirreza Hemmatzade6/30/22, 3:30 PMSwiss Neutron Science on the European ScaleTalk
$TmB_{4}$ is a member of rare-earth tetraborites family where $Tm^{+3}$ ions can be topologically mapped to a Shastry-Sutherland lattice,it has few magnetic phases with plateaus in magnetisation, among them the 1/8 plateau phase is a meta-stable phase and reported to depend strongly on the temperature and history of the system. In order to study this phase using with neutrons scattering we...
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Cornelis Bernardus Doorenbos6/30/22, 3:45 PMSwiss Neutron Science on the European ScaleTalk
The Paul Scherrer Institute operates a Ultracold Neutron (UCN) source based on solid deuterium as a moderator and UCN converter. UCNs are storable for several minutes. This makes them uniquely suitable for measuring fundamental properties of the neutron, such as the search for the neutron electric dipole moment, in the n2EDM experiment.
It is essential to increase experimental statistics....
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32. 【708】The n2EDM experiment – A new high-sensitivity search for the neutron electric dipole momentAnastasio Fratangelo (University of Bern)6/30/22, 4:00 PMSwiss Neutron Science on the European ScaleTalk
The neutron Electric Dipole Moment (EDM) represents a promising channel for finding new physics beyond the Standard Model. The existence of a neutron EDM violates the combined symmetries of Parity (P) and Charge conjugation (C) invoking CPT-symmetry. This new source of CP violation could help to explain the baryon asymmetry of the Universe. The present-best upper limit of 1.8∙10-26 e·cm (90%...
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Marc Persoz6/30/22, 4:45 PMSwiss Neutron Science on the European ScaleTalk
Neutron grating interferometers can be employed as powerful tools to perform high-precision measurements of deflection angles and scattering. A novel concept of a symmetric Talbot-Lau interferometer using absorption gratings is under development at the University of Bern. The ultimate goal of this project will be a sensitive measurement of the neutron electric charge. Currently, a...
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Victoria Kletzl6/30/22, 5:00 PMSwiss Neutron Science on the European ScaleTalk
The n2EDM experiment searching for the neutron electric dipole moment is currently being commissioned at PSI. Essential for a tenfold sensitivity improvement relative to the current best result is a uniform magnetic field, since any magnetic contamination of the apparatus may result in a systematic error of the measurement.
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Parts in the direct vicinity of the neutron precession chamber need... -
Anastasio Fratangelo (University of Bern)6/30/22, 5:15 PMSwiss Neutron Science on the European ScaleTalk
The existence of a non-zero neutron Electric Dipole Moment (EDM) would violate CP symmetry and might help in the understanding of the apparent baryon asymmetry in the universe. The BeamEDM experiment aims to measure the neutron EDM using a novel technique which overcomes the systematic limitations of previous neutron beam experiments. BeamEDM exploits the time-of-flight technique with a pulsed...
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Nathalie Ziehl (ETH Zürich)6/30/22, 5:30 PMSwiss Neutron Science on the European ScaleTalk
Parity-conjugated copies in the weak interactions of Standard Model particles, so called mirror-particles, could provide answers for several standing issues in physics today. Mixing between neutrons and mirror-neutrons in particular would violate baryon number conservation, a necessary ingredient for baryogenesis.
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The mirror-neutron experiment at PSI searches for neutron to mirror-neutron... -
Dr Florencia Malamud (Paul Scherrer Institute)6/30/22, 5:45 PMSwiss Neutron Science on the European ScaleTalk
Bragg edge imaging (BEI) is based on the wavelength-dependent effect of neutron diffraction at crystal lattice planes on the neutron transmission spectrum. The wavelengths of discontinuities, Bragg edges, in the neutron transmission spectrum due to Bragg scattering of polycrystalline materials directly relate to respective lattice spacings, allowing crystalline phase identification and...
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Dr Tim A. Butcher (Paul Scherrer Institut, Trinity College Dublin)6/30/22, 6:00 PMSwiss Neutron Science on the European ScaleTalk
Gadolinium (Gd) salt solutions are paramagnetic liquids that can be manipulated by magnetic field gradients. Apart from possessing a large magnetic moment, Gd has the highest neutron absorption cross section of all naturally occurring elements. Neutron imaging was employed to investigate the effect of the magnetic force by mapping Gd$^{3+}$ concentration evolutions. It was demonstrated that...
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Kostiantyn Sakhatskyi6/30/22, 6:15 PMSwiss Neutron Science on the European ScaleTalk
Fast neutrons offer high penetration capabilities for both light and dense materials due to their comparatively low interaction cross-sections for which X-rays or thermal neutrons do not provide sufficient penetration. One of the main factors, preventing the widespread application of this technique, are limitations of current fast neutron detectors, including low efficiency, high...
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Stavros Samothrakitis (Paul Scherrer Institute)6/30/22, 6:30 PMSwiss Neutron Science on the European ScaleTalk
For polycrystalline materials, material properties including strength, deformation behavior, and stress corrosion cracking resistance depend on the texture of the crystalline microstructure. Conventional assessment of texture is either limited to thin surface regions or it is destructive. Only X-ray diffraction and neutrons enable quantitative studies of bulk texture. Here, we report how...
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