Streltsov Sergey S, Shorikov Alexey O, Skornyakov Sergey L, Poteryaev Alexander I, Khomskii Daniel I
M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.
Ural Federal University named after the first President of Russia B.N. Yeltsin, Theoretical Physics and Applied Mathematics Department, Ekaterinburg, Russia.
Sci Rep. 2017 Oct 11;7(1):13005. doi: 10.1038/s41598-017-13312-4.
Recent discovery of the pyrite FeO, which can be an important ingredient of the Earth's lower mantle and which in particular may serve as an extra source of water in the Earth's interior, opens new perspectives for geophysics and geochemistry, but this is also an extremely interesting material from physical point of view. We found that in contrast to naive expectations Fe is nearly 3+ in this material, which strongly affects its magnetic properties and makes it qualitatively different from well known sulfide analogue - FeS. Doping, which is most likely to occur in the Earth's mantle, makes FeO much more magnetic. In addition we show that unique electronic structure places FeO "in between" the usual dioxides and peroxides making this system interesting both for physics and solid state chemistry.
最近发现的黄铁矿FeO，它可能是地球下地幔的重要成分，尤其可能作为地球内部额外的水源，这为地球物理学和地球化学开辟了新的前景，但从物理学角度来看，它也是一种极其有趣的物质。我们发现，与天真的预期相反，这种物质中的铁几乎为3价，这强烈影响了它的磁性，使其在性质上与著名的硫化物类似物FeS不同。在地幔中最有可能发生的掺杂使FeO的磁性更强。此外，我们表明独特的电子结构使FeO处于普通氧化物和过氧化物之间，这使得这个体系在物理学和固态化学方面都很有趣。
