Valence Instability, Magnetism and Superconductivity in Single Crystal Multinary Copper-Niobium Oxides

单晶多元铜铌氧化物的价态不稳定性、磁性和超导性

• 批准号: 9403895
• 负责人: Robert Shelton
• 金额: $ 27.45万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-15 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9403895&HistoricalAwards=false
• 关键词: Valence; Instability; Magnetism; Superconductivity; Single

9403895 Shelton Technical abstract: This experimental research program focuses on multinary oxides that display a combination of properties including high-temperature superconductivity, long-range magnetic order, valence fluctuations and anisotropy order parameters. To determine the intrinsic physical properties, the research emphasizes experiments on high quality single crystals. Three systems form the core of these studies; namely rare-earth barium cuprates, rare- earth barium niobates, and rare-earth strontium niobates. To insure consistency and uniformity in interpreting the experimental results, a great variety of complimentary experiments will be performed on the single crystals. Non-technical abstract: This experimental research program focuses on three families of materiald that show great promise for technological applications as well as probing the exciting state of high-temperature superconductivity. Due to the intrinsic complexity of these multi-component materials, great emphasis is place on using the highest quality crystals for this study. Goals with practical components include: elemental substitutions to stabilize the superconducting state against fluctuations in operating environment of the superconducting device; discovery and characterization of materials from the same family suitable as insulating analogs in device fabrication. ***

9403895 Shelton技术摘要：该实验研究计划的重点是显示多种氧化物，这些氧化物显示了包括高温超导性，远距离磁性，价值波动和各向异性秩序参数的组合。 为了确定内在的物理特性，该研究强调了对高质量单晶的实验。 三个系统构成了这些研究的核心；即稀土钡铜矿，稀土芳基芳基酸盐和稀土腹膜。 为了确保一致性和统一性在解释实验结果时，将对单晶进行多种免费实验。 非技术摘要：该实验研究计划的重点是三个对技术应用表现出巨大希望以及探索高温超导性令人兴奋的状态的巨大希望。 由于这些多组分材料的内在复杂性，因此非常重视这项研究的最高质量晶体。 具有实际组件的目标包括：稳定超导状态的元素替换，以防止超导装置的操作环境中的波动；从同一家族中发现和表征适合在设备制造中绝缘类似物的材料。 ***