Magnetic State of Cobalt in Layered Chalcogenide Fe4Co3Se8

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Physics of Metals and Metallography Pub Date : 2024-04-21 DOI:10.1134/s0031918x23602469

Yu. V. Piskunov, V. V. Ogloblichev, A. F. Sadykov, D. F. Akramov, A. G. Smolnikov, A. P. Gerashchenko, N. V. Selezneva, N. V. Baranov

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Abstract

The researches of the structural and magnetic properties of the layered chalcogenide Fe₄Co₃Se₈, which has a ferrimagnetic order below T = 196 K, have been performed by means of X-ray diffraction, magnetic susceptibility measurements, and ⁵⁹Co nuclear magnetic resonance (NMR) spectroscopy. It is found that the effective magnetic moment of iron ions is μ_eff ≈ 5.90(5) μ_B. The components of the magnetic shift and electric field gradient tensors at the Co nuclei sites have been determined. The hyperfine field induced on Co nuclei from neighboring iron ions has been estimated from the temperature dependences of the shift and susceptibility in Fe₄Co₃Se₈. It was also established that cobalt ions in Fe₄Co₃Se₈, as well as in the Co₇Se₈ compound, do not have intrinsic magnetic moment, but they do have a moment induced from neighboring iron ions \(\mu _{{{\text{eff}}}}^{{{\text{Co}}}}\) ≈ 0.36(4) μ_B, which decreases at the magnetic ordering to 0.07(1)μ_B due to mutual compensation of contributions from neighboring iron ions.

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层状钙钛矿 Fe4Co3Se8 中钴的磁性状态

摘要通过 X 射线衍射、磁感应强度测量和 59Co 核磁共振（NMR）光谱，研究了层状 Chalcogenide Fe4Co3Se8 的结构和磁性能，它在 T = 196 K 以下具有铁磁阶。研究发现，铁离子的有效磁矩为 μeff ≈ 5.90(5) μB。Co 核点的磁移和电场梯度张量的分量已经确定。根据 Fe4Co3Se8 中磁偏移和磁感应强度的温度相关性，估算出了邻近铁离子在钴核上诱导的超频场。研究还确定，Fe4Co3Se8 中的钴离子以及 Co7Se8 化合物中的钴离子不具有本征磁矩，但它们具有邻近铁离子诱导的磁矩 \(\mu _{{text\{eff}}}}^{{text\{Co}}}}\00) ≈ 0.36(4) μB，由于邻近铁离子贡献的相互补偿，该磁矩在磁有序时减小到 0.07(1)μB 。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics of Metals and Metallography 工程技术-冶金工程

CiteScore

2.00

自引率

25.00%

发文量

108

审稿时长

3 months

期刊介绍： The Physics of Metals and Metallography (Fizika metallov i metallovedenie) was founded in 1955 by the USSR Academy of Sciences. Its scientific profile involves the theory of metals and metal alloys, their electrical and magnetic properties, as well as their structure, phase transformations, and principal mechanical properties. The journal also publishes scientific reviews and papers written by experts involved in fundamental, application, and technological studies. The annual volume of publications amounts to some 250 papers submitted from 100 leading national scientific institutions.