Recherche

magnet is a geometrically symmetric split coil, which can be operated in both symmetric and asymmetric field modes (for experiments with polarized neutrons). In order to minimize the stray fields, a super ... provide you with a uniquely powerful measurement platform. More recently, to overcome the growing problem of helium shortage, Oxford ...

particle–hole excitation of a spinon Fermi surface. The results therefore point to the existence of a quantum spin liquid state with a spinon Fermi surface in YbMgGaO 4 , which has a perfect spin-1/2 triangular ... spin excitations, covering a wide region of the Brillouin zone. The observed diffusive spin excitation persists at the lowest measured ...

along the c-axis. Here the low-energy excitation spectrum of Nd0.05 Ce0.95 CoIn5 was measured, where a spin resonance was observed. The spin resonance is only observed for temperatures below Tc, and has

whether the glass transition in structural glasses is a gradual freezing or a phase transition. In this example, neutron spin echo (NSE) results reveal a pure power-law time decay of the spin autocorrelation ... glass dynamics The glass transition, characterized by a dramatic slowing down of the dynamics without any noticeable change in the spatial ...

Fe particles associated with a “superspin” embedded in an insulating matrix of Al2O3. The measurement at a correlation time of 200 ns in this experiment is equivalent to a measurement at an energy transfer

parallel stripes of doped holes carrying spin S=1/2 in a background of Ni 2+ ions carrying spin S=1. The contour plot, which was constructed from a 25 x 35 rectangular grid of points measured on IN8, shows ... superconductivity. The behaviour of the spin degrees of freedom in the stripes would be a crucial factor in the formation of a ...

acronym for “CRYOgenic Polarization Analysis Device”. The sample is in its center, in a magnetic field free zone created by a superconducting enclosure. Two sets of fixed and mobile coils make it possible to ... collinear antiferromagnetic samples. Other kinds of magnetic samples modifies the beam polarization in a much complex way and this ...

the neutron drip line. It is speculated that very neutron-rich nuclei possess, for heavier species, a neutron skin. The increased neutron density at the nuclear surface is thought to be the origin of new ... particular, the energies, lifetimes and decay modes of microsecond isomers were studied. The figure gives a systematic survey of the ...

incident neutrons and thus the energy resolution and momentum transfer. IN16b is a very versatile instrument which includes a time-of-flight option to significantly increase the dynamic range. Spin-echo ... py probes the dynamics of magnetic moments, molecules and lattices over length scales ranging from a few angstroms to tens of nanometers, and ...

the sample is measured with a thermometer located near the sample in the exchange gas. With the stick 240ILUP12 a low vertical force can be applied onto the sample inside a Ø49 mm (or more) Orange cryostat ... , an electric field can be applied in a vacuum space once the sample has been cooled down with exchange gas. The maximum applied voltage is ...