Preparation and Physical Properties of Single Crystals and Thin Films of Neodimium Cerium Copper Oxides and Related Copper Oxides

铌铈铜氧化物及相关铜氧化物单晶和薄膜的制备及物理性能

• 批准号: 9510475
• 负责人: richard greene
• 金额: $ 26.01万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-15 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510475&HistoricalAwards=false
• 关键词: Preparation; Physical; Properties; Single; Crystals

9510475 Greene This project has as its goal the preparation and characterization of high quality neodymium-cerium- copper- oxygen (NCCO) single crystals and thin films and lanthanum-strontium-copper-oxygen (LSCO) thin films. Comprehensive physical property measurements will be carried out with the aim of providing reliable experimental constraints on the theories for high temperature superconductivity and anomalous normal state properties of copper oxides. A detailed comparison of the electron- doped NCCO system and the hole-doped LSCO system will be made in order to better understand the transition between insulating, metallic and superconducting phases as the cerium, strontium, or oxygen composition is changed. %%% Many copper oxide materials are superconductors at temperatures above the boiling point of liquid nitrogen (77K) and have potential for applications. However, an understanding of why these materials are superconductors at such high temperatures is lacking at present. The goal of this project is to prepare and characterize some selected copper oxide superconductors by improved methods. This is expected to lead to a better understanding of how these materials work, and hopefully, to insights on how to prepare materials which are better for technological applications. ***

9510475 Greene这个项目的目标是高质量北亲铜氧（NCCO）单晶的制备和表征，以及薄膜以及灯笼甲状腺甲状腺含量 - 波皮氧气（LSCO）薄膜。 将进行全面的物理特性测量，目的是为高温超导性和铜氧化物的异常正常状态提供可靠的实验限制。将对电子掺杂的NCCO系统和孔掺杂的LSCO系统进行详细比较，以便更好地了解绝缘，金属和超导阶段之间的过渡，因为葡萄，腹膜，畸形或氧气组成更改。 %% %%许多氧化铜材料是高于液氮沸点（77K）的温度下的超导体，并且具有应用的潜力。 但是，目前缺乏在如此高温下这些材料为为什么是超导体的理解。 该项目的目的是通过改进的方法准备和表征一些选定的氧化铜超导体。 预计这将使人们更好地了解这些材料的工作原理，并希望可以洞悉如何准备对技术应用更好的材料。 ***