Crystal Structural, Magnetic, and Transport Properties of Layered Cobalt Oxyfluorides, Sr2CoO3+xF1–x (0 ≤ x ≤ 0.15)
作者： Yoshihiro Tsujimoto , Clastin I. Sathish , Kun-Pyo Hong , Kengo Oka , Masaki Azuma
DOI: 10.1021/IC300116H
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摘要: The crystal structure of the layered cobalt oxyfluoride Sr2CoO3F synthesized under high-pressure and high-temperature conditions has been determined from neutron powder diffraction synchrotron data collected at temperatures ranging 320 to 3 K. This material adopts tetragonal space group I4/mmm over measured temperature range is analogous n = 1 Ruddlesden–Popper type perovskite. In contrast related oxyhalide compounds, present exhibits unique coordination environment around Co metal center: coexistence square pyramidal anion disorder between O F apical sites. Magnetic susceptibility electrical resistivity measurements reveal that an antiferromagnetic insulator with Neel TN 323(2) magnetic by a G-type order propagation vector k (1/2 1/2 0) wi...
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