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![[Figure 9]](uq5003fig9mag.jpg)
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Figure 9
(a) Neutron diffuse scattering measurements as a function of modulus wavevector |q| from a Co6.75Zn6.75Mn6.5 powder sample at 2 K. The total observed scattering cross section is shown by black symbols. Using xyz polarization analysis, the nuclear coherent (blue symbols), nuclear spin-incoherent (green symbols) and magnetic (red symbols) scattering cross sections are extracted from the total scattering. Grey dashed lines indicate nuclear peak positions due to Al Bragg scattering from both the cryostat and sample container. (b) A closer look at the pure magnetic component of the total scattering cross section. Both grey and red symbols represent the entire measured profile. Grey symbols denote either clear or suspected Bragg scattering, and are excluded from the data set for the purposes of fitting the mean-field model to the data. Two fits of the mean-field model discussed in the text are shown. The blue solid line corresponds to a fit of a mean-field model that takes into account just a single nearest-neighbour antiferromagnetic interaction on the 12d site, J1 = −0.53 meV. The black dashed line shows the improved fit of the mean-field model when taking into account a second nearest-neighbour interaction J2. In this case the fitted parameters are J1 = −0.67 meV and J2 = 0.67 meV, indicating a probable combination of both antiferromagnetic and ferromagnetic interactions on the 12d site. |
![[Figure 9]](uq5003fig9.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
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