Magneto-structural coupling in SrTcxRu1-xO3 (x = 0.25,0.5) perovskites.

The structure and magnetic properties of the mixed technetium-ruthenium perovskites SrTc x Ru 1-x O 3 (x ​= ​0.25 and 0.5) have been investigated using variable temperature synchrotron X-ray diffraction, magnetic susceptibility measurements, and DFT calculations. Both oxides are isostructural with SrRuO 3 and SrTcO 3 , and there is no evidence of long-range cation order. Magnetostriction is observed along the c -axis for both oxides. The inverse susceptibility and DFT calculations suggest a cation-disordered ferrimagnetic ground state for SrTc0.5Ru0.5O3. Image 1 • Mixed technetium-ruthenium perovskites SrTc x Ru 1-x O 3 oxides prepared. • Structures determined using temperature synchrotron X-ray diffraction. • Magnetic susceptibility measurements suggest a ferrimagnetic ground state. • DFT calculations suggest a cation-disordered ferrimagnetic ground. [ABSTRACT FROM AUTHOR]