Neutron magnetic satellites

Several magnetization isotherms for temperatures between 4.2 and 106.4 K are shown in fig. 6.16. With an applied field along [100], observation of the appropriate neutron diffraction satellites indicated the gradual formation of a single domain, with the field normal to the plane of the spiral, that is completed by about 0.8 T. In such a configuration the magnetization arises from a lifting of the ordered moments out of the plane and, in the absence of anisotropy, the... 

Fig. 3. Neutron scattering data for a 400 A Dy film grown epitaxially on Lu. The peak at 2.23 A is the (0002) peak of Dy that at 2.27 is from the Y under-layer. Note the symmetric magnetic satellites surrounding the (0002) peak. The sample is ferromagnetic at and below 95 K.

Fig. 25. Combined X-ray (solid circles) and neutron (open circles) scattering results from Er for the fundamental wave vector and for the additional scattering from lattice modulations at 2t , and 2r - %. The peak observed at r in the c-axis modulated phase above 52 K is the principle magnetic satellite of the (110) reflection, obtained by neutron scattering. All remaining data are satellites of the Bragg (002) and (004) reflections. The X-ray results at 2t - were partially obscured by higher-order contamination. (From Gibbs et al. 1986.)...

Figure 12. Simulation of the temperature dependence of the neutron intensities of the first and third harmonics of the incommensurate satellite reflection of copper metaborate at zero magnetic field.

The incommensurate magnetic structure of YbPtAl was determined by neutron diffiac-tion experiments. The wave vector is = [0.3000]. The presence of (000) satellites shows that the directions of the magnetic moments are not parallel to the propagation direction a (Bonville et al. 2000a,b). 

The ErPd2Sn stannide is characterized by an antiferromagnetic structure with a double cubic magnetic lattice (Stanley et al. 1987). But there are satellites in the neutron diffraction pattern which indicate a long-range modulation of the diffraction magnetic density component. 

Fig. 100. The temperature dependence of the magnetic neutron scattering intensity at the satellite peak (0,0,0.28), the ac susceptibility, and the magnetic specific heat for Inset ...

Fig. 41. HoosEiqs alloy. Integrated intensity of the resonant satellites from the same data series as in fig. 40 Ho edge X-ray data (solid circles), Er edge data ( ), and neutron data (open circles). The vertical lines mark the boundaries of the three magnetic phases. (From Pengra et al. 1994.)...

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