(Mn1−xAxIV)Bi2Te4 AIV = Ge, Pb, Sn磁性能的比较研究

IF 2.6 4区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Dmitry A. Estyunin, Anna A. Rybkina, Konstantin A. Kokh, Oleg E. Tereshchenko, Marina V. Likholetova, Ilya I. Klimovskikh, Alexander M. Shikin
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引用次数: 0

摘要

我们研究了非磁性元素(AIV = Ge, Pb, Sn)部分取代Mn原子的反铁磁(AFM)拓扑绝缘体MnBi2Te4的磁性。采用SQUID磁强计对不同元素浓度(10-80%)的样品进行了研究。结果表明,随着AIV = Ge, Pb, Sn浓度的增加,所有替代材料的磁有序类型仍然是AFM,而n温度(TN)和自旋翻转跃迁场(HSF)降低。不同元素的下降率不同,Pb的下降率最高,其次是Sn和Ge。这种行为归因于磁稀释和晶格参数增加对磁性能的综合影响,在(Mn1−xPbx)Bi2Te4中最为突出。此外,TN和HSF实验数据的线性近似表明,纯MnBi2Te4的磁性参数比实验观察到的要高,这表明它们在低浓度下可能发生非单调变化,并且通过少量非磁性杂质掺杂MnBi2Te4可以增强磁性。值得注意的是,含有10% Pb取代的(Mn1−xPbx)Bi2Te4样品确实表现出增加的磁性参数,这也通过ARPES的局部探针分析得到了验证。我们的研究结果揭示了定制mnbi2te4基材料的磁性行为,为器件技术的潜在应用提供了见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative Study of Magnetic Properties of (Mn1−xAxIV)Bi2Te4 AIV = Ge, Pb, Sn
We investigated the magnetic properties of the antiferromagnetic (AFM) topological insulator MnBi2Te4 with a partial substitution of Mn atoms by non-magnetic elements (AIV = Ge, Pb, Sn). Samples with various element concentrations (10–80%) were studied using SQUID magnetometry. The results demonstrate that, for all substitutes the type of magnetic ordering remains AFM, while the Néel temperature (TN) and spin-flop transition field (HSF) decrease with an increasing AIV = Ge, Pb, Sn concentration. The rate of decrease varies among the elements, being highest for Pb, followed by Sn and Ge. This behavior is attributed to the combined effects of the magnetic dilution and lattice parameter increase on magnetic properties, most prominent in (Mn1−xPbx)Bi2Te4. Besides this, the linear approximation of the experimental data of TN and HSF suggests higher magnetic parameters for pure MnBi2Te4 than observed experimentally, indicating the possibility of their non-monotonic variation at low concentrations and the potential for enhancing magnetic properties through doping MnBi2Te4 with small amounts of nonmagnetic impurities. Notably, the (Mn1−xPbx)Bi2Te4 sample with 10% Pb substitution indeed exhibits increased magnetic parameters, which is also validated by local-probe analyses using ARPES. Our findings shed light on tailoring the magnetic behavior of MnBi2Te4-based materials, offering insights into the potential applications in device technologies.
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来源期刊
Magnetochemistry
Magnetochemistry Chemistry-Chemistry (miscellaneous)
CiteScore
3.90
自引率
11.10%
发文量
145
审稿时长
11 weeks
期刊介绍: Magnetochemistry (ISSN 2312-7481) is a unique international, scientific open access journal on molecular magnetism, the relationship between chemical structure and magnetism and magnetic materials. Magnetochemistry publishes research articles, short communications and reviews. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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