Neutron Larmor diffraction with double and single precession arm

A review is given of double and single arm Larmor diffraction. With the former a lattice-spacing resolution down to 10-6 can be obtained. The latter is a good high-resolution alternative if the sample or sample environment disturbs the magnetic field, e.g. ferromagnetic samples or applied magnetic fields. By choosing the tilt angle of the...

Measurement of gravitation-induced quantum interference for neutrons in a spin-echo spectrometer

With a neutron spin-echo reflectometer (OffSpec at ISIS, UK) it is possible to measure the gravitation-induced quantum phase difference between the two spin states of the neutron wave function in a magnetic field. In the small-angle approximation, this phase depends linearly on the inclination angle of the neutron beam with respect to the...

Larmor neutron diffraction with one precession arm

A new variant of Larmor neutron diffraction, applying only a single precession arm in the initial beam, is proposed. The single arm, together with the polarizer and analyser and possible rotators, are mounted in front of the sample. The great advantage with respect to the case with another precession arm in the reflected beam is that magnetic...

Manifestation of the geometric phase in neutron spin-echo experiments

We show how the geometric (Berry’s) phase becomes manifest on adiabatic rotation of the polarization vector in the magnetic field configuration in the arms in a neutron spin echo (NSE) experiment.When the neutron beam used is monochromatic, a geometric phase collected in one spin-echo arm can be exactly compensated in the other arm either by an...

Coherence approach in neutron, x-ray, and neutron spin-echo reflectometry

Based on the application of coherence theory to neutron scattering a description is given of the propagation of neutrons or x-rays through a reflectometer. Important coherence effects at the sample position are discussed. Further, an outline is given how to determine the measured count rate in a detector on the basis of this method including...

Polarization optimization of spin-echo small angle scattering instruments

The polarization optimization in a small angle scattering spin-echo setup is considered, under the depolarization and phase errors that occur in field transition regions by improper adjustment of inclined magnetized foils as n-flippers. Various correction procedures are discussed. In these setups with precession fields perpendicular to the beam...

Neutron spin turners with a rotating magnetic field: First experiments

Neutron depolarization as a tool for studying phase transformations in steels

In-situ studies of the ferrite nucleation and growth in C-Mn steels

Nucleation and growth of ferrite and perlite in a medium carbon steel studied using neutron depolarization

Neutron depolarisation: A novel technique for studying phase transformation kinetics in steels

Neutron Depolarization Applied to the Austenite Ferrite Phase-Transformation in Steel

Measurement of magnetic correlation effects in particulate recording media

Magnetic correlations in small particle systems, studied with the neutron depolarization technique

Magnetic correlations in alumite studied by neutron depolarisation

Neutron depolarization study of ferromagnetic domain structures