Figure 2
Single crystal diffraction layer hk4 from Mn[Co] at different temperatures: (a) at room-temperature diffraction shows only diffuse scattering from the vacancies, (b) after flash-cooling to 90K additional diffraction features in a shape of diffuse clouds appear; (c) samples which are slowly cooled to 100 K show only a weak hint of diffuse scattering clouds; (d) three cross sections of diffuse `cloud' located at 1.64 0.38 4, near reflection 204. The cloud has the shape of a disc with a short dimension in the c* direction: HWHM of the cloud is 0.04 Å−1 in a* and b* directions, and 0.02 Å−1 in the c* direction corresponding to correlation lengths of 25 Å and 50 Å, respectively. |