Effect of magnetic and crystal structure transformation in the metastable multi-valent La0.5Ba0.5CoO2.87 modified by pulsed huge-field

We suppose that accurate temperature dependent high-resolution X-ray powder diffraction (XPD) measurements in order to study an unusual effect of crystal structure transformation just metastable(!) multi-valence(!) La0.5Ba0.5CoO2.87 modified by pulsed magnetic field 20 Tesla. The combination of XPD results with and neutron diffraction (HRPT, PSI, accepted proposal 20212847) will give us the opportunity to establish the correlations between crystal and magnetic structure changes and clarify the origin of magneto-structural phase transition near the paramagnetic(PM) → ferromagnetic(FM)→antiferromagnetic(AFM) spin-state transitions, as well as to provide an input for a novel modeling methods [1-4] based on the density functional theory (DFT, DFT+U, DFT+U+SO) and the dynamic mean-field theory (DFT+DMFT).