铌酸铋掺杂镍和铬的nexafs光谱和磁化率

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY

Journal of Siberian Federal University. Chemistry Pub Date : 2020-09-01 DOI:10.17516/1998-2836-0187

I. Vasilyeva, S. Nekipelov, B. Makeev, Alexey G. Krasnov, N. Zhuk

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引用次数: 0

摘要

采用磁化率法和nexafs光谱法研究了Bi5Nb3-3xМ3xO15-δ (М-Cr,Ni)固溶体中镍和铬原子的电子态和交换相互作用的特征。获得了镍和铬氧化物的NEXAFS光谱。根据固溶体中的x射线光谱，铬原子主要处于Cr(III)的带电态，镍原子在八面体配位中处于Ni(II)的高自旋态。在固溶体中，顺磁性的铬和镍原子以单体和簇的形式存在，具有常见的反铁磁性交换类型

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NEXAFS–Spectra and Magnetic Susceptibility of Nickel and Chromium Doped of Bismuth Niobate

The electronic state and character of exchange interactions of nickel and chromium atoms in solid solutions of Bi5Nb3-3xМ3xO15-δ (М-Cr,Ni) was researched by methods of magnetic susceptibility and NEXAFS-spectroscopy. NEXAFS spectra of nickel and chromium oxides were obtained. According to X-ray spectroscopy in solid solutions, chromium atoms are mainly in the charge state of Cr(III), and nickel atoms in the high-spin state of Ni(II) in octahedral coordination. In solid solutions, paramagnetic chromium and nickel atoms are present in the form of monomers and clusters with a common antiferromagnetic type of exchange

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来源期刊

Journal of Siberian Federal University. Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

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0.00%

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