Spin-flip scattering

Measurements of the self-correlation function with neutrons are normally performed on protonated materials since incoherent scattering is particularly strong there. This is a consequence of the spin-dependent scattering lengths of hydrogen. Due to spin-flip scattering, which leads to a loss of polarization, this... 

The spin-incoherent scattering (prominent for protons) involves a change of the spin-state of the scattered neutrons (spin-flip scattering) with a probability of%. 

Fig. 9. Spectrum of light scattered at 90° from n-InSb (ne = 5 1016 cm-3). Notice the scale change in curve (a) for the intensity of the spin-flip scattered light...

Part of the water-vapour absorption band at 1800 cm-1 was recorded by Mellish et al. 9°) in a similar way. They used a frequency-doubled C02 laser for excitation of the stimulated spin-flip scattering tunable in the range from 5.24 to 5.62 /am. 

We first assumed that the inelastic and spin-flip scattering lengths are much larger than the Au layer thickness, so that we can neglect these processes... 

Tu. In our study of these materials we have found some evidence that this temperature could be related to a spin flip scattering mechanism which is also responsible for the Kondo resistivity observed in these materials. 

For nuclear incoherent scattering from a non-magnetic system with randomly oriented nuclear spins, the cross-sections per atom are independent of the neutron polarization direction and the spin-flip scattering cross section is twice that for non spin-flip scattering ... 

As tj is increased, so i.s the phase space available for spin-flip scattering and hence tire linewidth. The most important processes involve interchain scattering with q 23c... A rough calculation, taking account of the pnase-space cutoffs imposed by conservation of energy, yields in the high-temperature limit ... 

Fig. 31. Temperature-dependent conductance data from a Y123/Cu tunnel junction. Voltage is defined to be the voltage of Cu with respect to Y123. The ZBCP is observed to split in zero magnetic field at 1.5 K. Inset zero-bias conductance, G(0), versus temperature for the same junction, also in zero field. The downfami in G(0) below 10 K is in contrast to the G(0) In(T ) behavior expected from spin-flip scattering proposed by Lesueur et al. (1992), which is indicated by the dotted line. After Covington et al. (1997, fig. 1).

The thermopower of concentrated VF systems or compounds shows a huge Kondo peak (see fig. 9) and in addition a low-temperature peak of opposite sign (Franz et al. 1978), which can be explained by inelastic spin-flip scattering between the 4f and conduction electrons and which is due to the RKKY interactions (Fischer 1989b). The thermopower can also strongly depend on CF effects and seems to be far from universal. 

The spin-flip scattering of conduction electrons by Ce ions was measured by Rrttori et al. (1975a) via the ESR bottleneck which is active in the compounds LuA iGd and YAljiGd doped with cerium. Similar investigations were reported in a paper by Preusse et al. (1981). 

Magnetic form factor for uranium (Frazer et al. (1965) and the contribution to spin-flip and non-spin-flip scattering for Q in the o -c -plane and H b from each component of the generalized susceptibility tensor ... 

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