Observation of neutron standing waves at total reflection of polarized neutrons by precision gamma-spectroscopy

Neutron Zeeman beam-splitting for the investigation of magnetic nanostructures

“…The sample was a bilayer Gd(5 nm)/Fe(100 nm)//glass(substrate) with the sizes 100(along beam)×60(width)×5(substrate thickness) mm 3 . The initial motivation of the investigation of this sample was demonstration of neutron standing waves [36,37] using enhanced neutron absorption in the absorbing Gd layer. But during the experiment, the beam splitting in a low parallel external field was recorded on the position-sensitive detector.…”

Peculiarities of neutron waveguides with thin Gd layer

“…The presence of the waveguide enhancement in systems with absorbing and ferromagnetic Gd layer can be seen either via dips on the total reflection plateau of non-spin-flip (NSF) reflectivities [10], [11] or as peaks in the spin-flip (SF) channel [7]. In the latter case the vector of magnetization should lie in the sample plane and be normal to the external magnetic field.…”

Structural characterization of soft interfaces by standing-wave fluorescence with X-rays and neutrons

“…In a study on a layered magnetic Fe/Gd structure deposited on a glass substrate, two polarization states of a neutron beam were used. The difference between the NSW formed with the two polarization states was quantified via the characteristic γ fluorescence after neutron capture by Gd [69]. In another study [70], neutron resonance in a 6 LiF/Ti/Cu/glass layered structure was quantified in simultaneous measurements of neutron reflectivity and the 6 Li(n, α) 3 H nuclear reaction as fluorescence signal.…”

“…This intensity maximum reflects the amplification of the NSW in the 6 LiF cap layer as it results from the resonance condition in the spacer layer. In another study by Aksenov and co-workers it was shown that experiments with NSW can yield specific structural information without the use of element-specific fluorescence radiation [71]. A NSW with a particular spin state was generated in a Cu/Ti/Co/ Ti multilayer structure on a glass substrate in a magnetic field.…”