Synthesis, structure, and properties of selected ZrCuSiAs type pnictide oxides and related compounds

ZrCuSiAs型磷族氧化物及相关化合物的合成、结构和性能

• 批准号: 168534186
• 负责人: Professor Dr. Rainer Pöttgen
• 金额: --
• 依托单位: Institut für Anorganische und Analytische Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/168534186?language=en
• 关键词: Synthesis; structure; properties; selected; ZrCuSiAs

The proposed project has three key subjects, i. e. (i) improvement of the synthesis conditions for RETPnO materials and explorative synthesis of the systems RE–T–Pn–O and RE–T–Pn–O–Cl including structural investigations, (ii) studies of magnetic, electrical and specific heat data of selected RETPnO phases, and (iii) systematic 57Fe Mößbauer spectroscopic studies of iron containing RE(AE)T2Pn2 and RETPnO phases. The preparative part is indispensable for synthesis of high-quality, X-ray pure samples for physical property measurements. Diverse preparation techniques (arc-melting, induction melting, metal- or salt-flux synthesis) are available. All samples will be studied in detail by powder X-ray diffraction and metallography in combination with EDX. Suitable single crystals will be used for structure refinements. These studies are the prerequisite for the diverse property investigations on well defined samples. 57Fe Mößbauer spectroscopy will systematically be used as a local technique for studying the electronic and magnetic behaviour of the respective materials. Together with theoretical investigations the main goal will be the elucidation of concrete structure-property-relations for the pnictides and pnictide oxides.

建议的项目有三个主要主题，即：e. (i)RETPnO材料合成条件的改进和RE-T-Pn-O和RE-T-Pn-O-Cl体系的探索性合成，包括结构研究，（ii）选定RETPnO相的磁性、电学和比热数据的研究，和（iii）含铁RE（AE）T2 Pn 2和RETPnO相的系统57 Fe穆斯堡尔谱学研究。制备部分是合成高质量、X射线纯样品用于物理性质测量所不可或缺的。可采用多种制备技术（电弧熔炼、感应熔炼、金属或盐助熔剂合成）。所有样品将通过粉末X射线衍射和金相结合EDX进行详细研究。合适的单晶将用于结构细化。这些研究是对定义明确的样品进行各种性质研究的先决条件。57 Fe穆斯堡尔谱将被系统地用作研究相应材料的电子和磁性行为的本地技术。连同理论研究的主要目标将是具体的pnictides和pnictide氧化物的结构-性能-关系的阐明。