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Citation: LI Junjie, HAO Xianfeng, LV Minfeng, MENG Jian. Tunable Synthesis and Magnetic Properties of Nano-shaped SrFeO_3-δ[J]. Chinese Journal of Applied Chemistry, ;2012, 29(6): 649-657. doi: 10.3724/SP.J.1095.2012.00403 shu

Tunable Synthesis and Magnetic Properties of Nano-shaped SrFeO_3-δ

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a Jilin Province Design and Research Institute for Petrochemical Engineering, Changchun 130021, China;
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b State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Corresponding author: MENG Jian,
Received Date: 9 September 2011
Available Online: 1 December 2011

SrFeO_3-δ products with microcube-shaped tetragonal type,and nano lamellae-shaped brounmillerite and orthorhombic mixed type were successfully synthesized by a molten salt route through controlling temperature and time and lid-closure reaction.The synthesized products were systematically studied by X-ray powder diffraction,field-emission scanning electron microscopy,transmission electron microscopy,and energy dispersive X-ray spectroscopy as well as thermogravimetric analysis.The results show that the sample SrFeO_2.86 has a tetrahedral symmetry with I4/mmm supercell.Evidence of weak superstructures,reflecting local oxygen ordering,is also obtained from electron diffraction.SrFeO_2.62 was found to be a composite material by combination of a brownmillerite phase with Ibma space group and an orthorhombic structure with Cmmm space group.The results of magnetic properties indicate that the morphology of the SrFeO_3-δ products has great effects on their properties.Reduced spin frustration is associated with an increasing ferromagnetic interaction.The shape anisotropy results in distinct difference of magnetic properties in different oxides with nearly the same composition.
- perovskite,
- nanometer,
- molten salts,
- magnetism
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Tunable Synthesis and Magnetic Properties of Nano-shaped SrFeO3-δ

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通讯作者: 陈斌, bchen63@163.com

Tunable Synthesis and Magnetic Properties of Nano-shaped SrFeO_3-δ