Structural, Magnetic and Orbital Complexities in the Frustrated Spinel, ZnV2O4
We have prepared two powder samples of ZnV2O4, one via a traditional high-temperature sintering method and the other via a novel rapid microwave-assisted route. We find that in the microwave sample, no structural transition occurs and the sample remains in a cubic phase down to 2 K. A single cusp in magnetic susceptibility at 11 K could be indicative of a spin glass phase. The sintered sample undergoes a structural transition at 40 K to a tetragonal structure. This is followed by an a magnetic transition at 13 K. We have performed a diffuse scattering study on the sintered sample on D7 (Exp. 5-32-897), where we find no indication of a long-range ordered magnetic ground state down to 2 K. Analysis using RMC methods shows that correlations between pairs of moments are weak and fall to zero within 15 A. We now wish to perform a similar study on the microwave sample in order to compare the magnetic ground states. This will allow us to complete our study on how synthesis affects the chemical structure and therefore the magnetic ground state.
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GRAHAM Jennifer and WILDES Andrew. (2021). Structural, Magnetic and Orbital Complexities in the Frustrated Spinel, ZnV2O4. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-926
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