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应用熔盐路线通过控制温度和时间成功合成了微立方和纳米片层形貌的SrFeO3-δ化合物。X射线衍射、场发射扫描电子显微镜、透射电子显微镜和能量色散X射线光谱(EDS)以及热重分析(TGA)结果表明,微立方形貌化合物SrFeO2.86为四方相,空间群I4/mmm,纳米片层形貌化合物SrFeO2.62是钙铁矿(空间群Ibma)和正交相(空间群Cmmm)的复合物。磁学性能研究表明,SrFeO3-δ形貌对其性能有明显地影响;自旋失挫的减少与铁磁相互作用的增加密切关联;尽管成分几乎相同,但是形貌上的各向异性导致了明显不同的磁学性能。
The molten salt route was used to synthesize SrFeO3-δ compounds with micro-cube and nanosheets morphology by controlling the temperature and time. X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy (EDS) and thermal gravimetric analysis (TGA) results show that the micro-cubic topography SrFeO2.86 tetragonal phase space group I4 / mmm, The nanosheets morphology SrFeO2.62 is a complex of hematite (space group Ibma) and the orthorhombic phase (space group Cmmm). Magnetic properties show that the morphology of SrFeO3-δ has a significant effect on its properties; the decrease of spin-frustration is closely related to the increase of the ferromagnetic interaction; although the compositions are almost the same, the anisotropy of morphology leads to Significantly different magnetic properties.