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六铁酸锶片状颗粒：一项全面的软X射线吸收和穆斯堡尔光谱研究。

Strontium hexaferrite platelets: a comprehensive soft X-ray absorption and Mössbauer spectroscopy study.

作者信息

Soria G D, Jenus P, Marco J F, Mandziak A, Sanchez-Arenillas M, Moutinho F, Prieto J E, Prieto P, Cerdá J, Tejera-Centeno C, Gallego S, Foerster M, Aballe L, Valvidares M, Vasili H B, Pereiro E, Quesada A, de la Figuera J

机构信息

Instituto de Quimica Física "Rocasolano", CSIC, Madrid, E-28006, Spain.

Institut "Jozef Stefan", Ljubljana, 1000, Slovenia.

出版信息

Sci Rep. 2019 Aug 13;9(1):11777. doi: 10.1038/s41598-019-48010-w.

DOI:10.1038/s41598-019-48010-w
PMID:31409875
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6692398/
Abstract

Platelets of strontium hexaferrite (SrFeO, SFO), up to several micrometers in width, and tens of nanometers thick have been synthesized by a hydrothermal method. They have been studied by a combination of structural and magnetic techniques, with emphasis on Mössbauer spectroscopy and X-ray absorption based-measurements including spectroscopy and microscopy on the iron-L edges and the oxygen-K edge, allowing us to establish the differences and similarities between our synthesized nanostructures and commercial powders. The Mössbauer spectra reveal a greater contribution of iron tetrahedral sites in platelets in comparison to pure bulk material. For reference, high-resolution absorption and dichroic spectra have also been measured both from the platelets and from pure bulk material. The O-K edge has been reproduced by density functional theory calculations. Out-of-plane domains were observed with 180° domain walls less than 20 nm width, in good agreement with micromagnetic simulations.

摘要

通过水热法合成了宽度达几微米、厚度为几十纳米的六铁酸锶（SrFeO，SFO）片状颗粒。利用结构和磁性技术相结合的方法对其进行了研究，重点是穆斯堡尔光谱以及基于X射线吸收的测量，包括对铁-L边和氧-K边的光谱学和显微镜观察，这使我们能够确定合成的纳米结构与商业粉末之间的异同。穆斯堡尔光谱表明，与纯块状材料相比，片状颗粒中铁四面体位置的贡献更大。作为参考，还测量了片状颗粒和纯块状材料的高分辨率吸收光谱和二向色光谱。通过密度泛函理论计算再现了O-K边。观察到了平面外磁畴，其180°畴壁宽度小于20纳米，这与微磁模拟结果吻合良好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/63422cd7f1e9/41598_2019_48010_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/a8aec628ad23/41598_2019_48010_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/7e794390f7a5/41598_2019_48010_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/591475a6ecce/41598_2019_48010_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/39b2ea616520/41598_2019_48010_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/7f8e0a8facc7/41598_2019_48010_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/9ea3393e25f8/41598_2019_48010_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/4d012f3e1300/41598_2019_48010_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/b53c50cbc83e/41598_2019_48010_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/c991d7496c6f/41598_2019_48010_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/d2145e5721d5/41598_2019_48010_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/63422cd7f1e9/41598_2019_48010_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/a8aec628ad23/41598_2019_48010_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/7e794390f7a5/41598_2019_48010_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/591475a6ecce/41598_2019_48010_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/39b2ea616520/41598_2019_48010_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/7f8e0a8facc7/41598_2019_48010_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/9ea3393e25f8/41598_2019_48010_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/4d012f3e1300/41598_2019_48010_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/b53c50cbc83e/41598_2019_48010_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/c991d7496c6f/41598_2019_48010_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/d2145e5721d5/41598_2019_48010_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c2c/6692398/63422cd7f1e9/41598_2019_48010_Fig11_HTML.jpg

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