Synthesis and crystal growth of new and well-established iron pnictide superconductors

新型和成熟的铁磷族化物超导体的合成和晶体生长

• 批准号: 237720895
• 负责人: Professor Dr. Bernd Büchner
• 金额: --
• 依托单位: Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW) e.V.
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237720895?language=en
• 关键词: Synthesis; crystal; growth; new; well

During this project, we will grow crystals with desired compositions and properties to address emergent questions in the field of iron pnictides. Our focus will be materials of the 1111, 122 and 111 pnictide family. We will grow new and emergent iron-pnictides where a reliable synthesis route guaranteeing high quality samples is yet unknown. During this project, we are aiming at the systematic exploration of the best suitable growth method (e.g. flux-growth, Bridgman technique) and optimal growth parameters (composition, temperature gradients ... ). At the same time, singleand polycrystals of well-established iron-pnictides will be provided to our collaboration partners as "samples on demand". For those samples, we already in full control of the growth parameters yielding high quality samples and hence, this part of the project is considered as a service to the SPP. We will use conventional solid state methods for the preparation of polycrystals of e.g. the 1111 iron-pnictides, and more sophisticated methods for the growth of single crystals. The growth methods range from growth using different types of flux to the Bridgman technique. All samples will be thoroughly characterised with respect to their structure, composition, magnetic, thermodynamic and transport properties. An important aspect of this project will be the systematic exploration and mapping of electronic phase diagrams as function of doping content.

在这个项目中，我们将培养具有所需成分和性质的晶体，以解决铁嘌呤领域的新问题。我们将重点关注1111、122和111 pnictide家族的材料。我们将培养新的和新兴的铁nictides，其中可靠的合成路线保证高质量的样品尚不清楚。在这个项目中，我们的目标是系统地探索最适合的生长方法（如通量生长，布里奇曼技术）和最佳生长参数（成分，温度梯度…）。同时，成熟的铁镍酸盐单晶和多晶将作为“按需样品”提供给我们的合作伙伴。对于这些样品，我们已经完全控制了生长参数，产生了高质量的样品，因此，项目的这一部分被认为是对SPP的服务。我们将使用传统的固态方法制备多晶，例如1111铁- nictides，以及更复杂的方法来生长单晶。生长方法的范围从使用不同类型的通量生长到布里奇曼技术。所有样品的结构、组成、磁性、热力学和输运性质都将被彻底表征。这个项目的一个重要方面将是系统地探索和绘制电子相图作为掺杂含量的函数。