Intermetallic compounds containing transition metal layers and chains in the Ae-T-X systems (Ae = alkaline-earth metal; T = Fe, Co, Ni; X = III-V main group element) as candidate materials for new superconductors

含有 Ae-T-X 体系过渡金属层和链的金属间化合物（Ae = 碱土金属；T = Fe、Co、Ni；X = III-V 主族元素）作为新型超导体的候选材料

• 批准号: 401518747
• 负责人: Dr. Viktor Hlukhyy
• 金额: --
• 依托单位: Lehrstuhl für Anorganische Chemie mit Schwerpunkt Neue Materialien
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/401518747?language=en
• 关键词: Intermetallic; compounds; containing; transition; metal

Discovery of high-temperature superconductivity in iron pnictides/chalcogenides encouraged us to extend our studies to other systems containing transition metals. The search for new compounds with ThCr2Si2-type structure and the alteration of the known 122 phases containing d-metal layers via chemical substitution will be done within this project. Beside the square-planar d-metal layers, which are present in iron-pnictides/chalcogenides, also other planar lattice arrangement or one-dimensional chains of transition metal atoms should be more widely studied with respect to superconducting properties. The syntheses and detailed structural investigations of polar intermetallic compounds in ternary systems Ae-T-X (Ae = alkaline-earth metal, T = Fe, Co, Ni, X = Al, Si, Ge, Sb) could lead to the discovery of new superconducting classes. Preparation of the samples will be done by different high-temperature techniques (arc-melting, induction melting, sintering). The synthesis of high-purity samples and high-quality single crystals for further studies of magnetic and transport properties is one of the goal of our research. X-ray powder and single crystal diffraction, scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX) and thermal analysis will be routinely used for the sample characterization. These investigations will be supplemented by basic electronic structure calculations.

铁磷属化物/硫属化物高温超导性的发现鼓励我们将研究扩展到其他含有过渡金属的系统。该项目将寻找具有ThCr 2Si 2型结构的新化合物，并通过化学取代改变已知的122个含有d-金属层的相。除了铁磷属化物/硫属化物中存在的正方形平面d-金属层之外，过渡金属原子的其他平面晶格排列或一维链也应该就超导性质进行更广泛的研究。三元系Ae-T-X（Ae =碱土金属，T = Fe，Co，Ni，X = Al，Si，Ge，Sb）中极性金属间化合物的合成和详细的结构研究可能导致新的超导类的发现。将通过不同的高温技术（电弧熔化、感应熔化、烧结）制备样品。合成高纯度的样品和高质量的单晶，为进一步研究磁性和输运性质提供材料是我们的研究目标之一。X射线粉末和单晶衍射、扫描电子显微镜和能量色散X射线光谱（SEM/EDX）和热分析将常规用于样品表征。这些调查将补充基本的电子结构计算。