Hyperfine field study on Sr2-xLaxFeCoO6 (x = 0.0, 1.0, 2.0)
With the advent of high-resolution back-scattering neutron spectrometers, Heidemann and co-workers investigated the hyperfine fields in Co and V based compound. So far hyperfine interaction study by high-resolution inelastic neutron scattering has been undertaken only on long-range ordered magnetic systems. We now wish to extend this study to short-range correlated magnetic systems and also to the spin-glass and spin-ice systems. We propose to investigate hyperfine interaction on double-perovskite compounds Sr2FeCoO6 SrLaFeCoO6 and La2FeCoO6 systematically. We know beyond doubt that Sr2FeCoO6 is a spin glass with a spin freezing temperature of Tsf = 100 K. We also know that SrLaFeCoO6 although does not show long-range magnetic order, has strong ferromagnetic correlations below Tc = 75 K. We know from neutron powder diffraction experiments that La2FeCoO6 undergoes a structural and magnetic phase transition at about T = 225 K. In order to study magnetic properties through hyperfine interaction we propose to measure hyperfine interaction on double-perovskite compounds Sr2FeCoO6 SrLaFeCoO6 and La2FeCoO6.
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CHATTERJI Tapan; APPEL Markus and Bernhard Frick. (2016). Hyperfine field study on Sr2-xLaxFeCoO6 (x = 0.0, 1.0, 2.0). Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-04-482
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