Browsing by Author "Orlandi, F"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Structural and magnetic studies of KOsO4, a 5d1 quantum magnet oxide
    (Royal Society of Chemistry, 2019-03-12) Injac, S; Yuen, AKL; Avdeev, M; Orlandi, F; Kennedy, BJ
    The quantum magnet KOsO4 has been characterized by a combination of X-ray and neutron diffraction techniques. The tetrahedrally coordinated Os7+ 5d1S = 1/2 cations were determined to order antiferromagnetically along the c axis below 35 K. A miniscule ordered magnetic moment of 0.46(18) μB was determined per Os7+ cation. © Royal Society of Chemistry 2021
  • No Thumbnail Available
    Item
    Structural chemistry and magnetic properties of the hexagonal double perovskite Ba2CoOsO6
    (American Chemical Society, 2020-04-14) Kayser, P; Orlandi, F; Avdeev, M; Zhang, Z; Kimpton, JA; Kennedy, BJ
    The double perovskite Ba2CoOsO6, synthesized using solid-state methods at ambient pressure, is shown as a rare example of an oxide adopting the 6L-trigonal (S.G.: P3̅m1) perovskite structure. The structure, refined using a combination of X-ray and neutron diffraction data, showed the Co and Os were ordered over the two dimer sites with additional ordering over the corner-sharing sites. Bond valence calculations show the presence of the Co(II) and Os(VI) valence states, and the latter was confirmed using X-ray absorption spectroscopy. Bulk magnetic susceptibility measurements show Ba2CoOsO6 to undergo antiferromagnetic ordering near 100 K, and neutron diffraction showed an ordered moment on the Co3, Co4, and Os2 sites; whereas the Os1/Co1 remained disordered. © 2020 American Chemical Society