Bi₅Nb₃−₃ₓCo₃ₓO₁₅−δ的磁化率和EPR研究

IF 0.4 Q4 MATHEMATICS

Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2020-06-01 DOI:10.17516/1997-1397-2020-13-3-342-349

N. Zhuk, V. Lutoev, D. Beznosikov, A. N. Nizovtsev, L. Rychkova

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引用次数: 1

摘要

研究了层状钙钛矿状Bi5Nb3−3xCo3xO15−δ含钴固溶体的磁化率、微观结构和EPR。固溶体Bi5Nb3−3xCo3xO15−δ (x60.005)可以呈四方共晶(sp. gr. P4/mmm)，随着钴含量的增加，在0.005 < x6 0.04 (sp. gr. P2/m)处出现单斜畸变。在固溶体中，发现Сo(III)和Co(II)原子主要以反铁磁交换类型形成交换键聚集体。EPR间接证实钴离子在八面体位置取代Nb(V)离子

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Magnetic Susceptibility and EPR Study of Bi₅Nb₃−₃ₓCo₃ₓO₁₅−δ

Magnetic susceptibility, microstructure and EPR of cobalt-containing solid solutions with layered perovskite-like structure Bi5Nb3−3xCo3xO15−δ have been studied. Solid solutions of Bi5Nb3−3xCo3xO15−δ (x60.005) can be crystallized in tetragonal syngony (sp. gr. P4/mmm), as cobalt content increases, monoclinic distortion of the unit cell emerges at 0.005 < x 6 0.04 (sp. gr. P2/m). The formation of exchange-bound aggregates of Сo(III) and Co(II) atoms predominantly with antiferromagnetic exchange types has been found in the solid solutions. EPR indirectly confirms that cobalt ions are in octahedral positions of substitution of Nb(V) ions

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来源期刊

Journal of Siberian Federal University-Mathematics & Physics MATHEMATICS-

CiteScore

0.90

自引率

0.00%

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