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Orbital molecules in vanadium oxide spinels

机译:氧化钒尖晶石中的轨道分子

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X-ray scattering and magnetization measurements have been used to explore the extent of orbital molecule formation in a variety of AV_2O_4 vanadium oxide spinels. Zn doping suppresses the long-range order of trimer-tetramer pairs that occurs in GaV_2O_4, but disordered orbital molecules are found across most of the Zn_x Gai_(1-x) V_2O_4 series (0.06 ≤ x < 0.875). Orbital molecules are not observed in the ground states of ZnV_2O_4, MgV_2O_4, or LiV_2O_4 but are likely present in Li_(0.5) Ga_(0.5) V_2O_4, an analog of the former two materials. The ratio of observed to ideal values of the V-V nearest-neighbor distance has been used to rationalize these observations.
机译:X射线散射和磁化测量已用于探索各种AV_2O_4钒氧化物尖晶石中轨道分子形成的程度。 Zn掺杂抑制了在GaV_2O_4中出现的三聚体-四聚体对的远距离顺序,但是在大多数Zn_x Gai_(1-x)V_2O_4系列中都发现了无序的轨道分子(0.06≤x <0.875)。在ZnV_2O_4,MgV_2O_4或LiV_2O_4的基态中未观察到轨道分子,但可能存在于前两种材料的类似物Li_(0.5)Ga_(0.5)V_2O_4中。 V-V最近邻距离的观测值与理想值之比已用于合理化这些观测值。

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  • 来源
    《Physical review》 |2020年第2期|024112.1-024112.12|共12页
  • 作者单位

    Centre for Science at Extreme Conditions and School of Chemistry University of Edinburgh West Mains Road Edinburgh EH9 3FD United Kingdom;

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