Determining Electron Spin-Transfer Mechanisms in Paramagnetic Ba2YMO6 (M = Mo, Re, Ru) Double Perovskites by 89Y and 137Ba MAS NMR Spectroscopy

The spin-transfer mechanisms of three B-site ordered double perovskites, Ba2YMO6 (M = Mo, Re, and Ru), were determined using variable-temperature 89Y and 137Ba magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. On the basis of symmetry-compatible overlap and trends observed in the MAS NMR, spin polarization was determined to be the dominant mechanism at the Y sites and spin delocalization to be the operative mechanism at …