Intrinsic Interactions Between Superconductivity and Magnetism in Ruthenocuprates and Quaternary and Pseudoquaternary Borocarbides

钌铜酸盐以及四元和准四元硼碳化物中超导性和磁性之间的内在相互作用

• 批准号: 0422949
• 负责人: Donald Naugle
• 金额: --
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0422949&HistoricalAwards=false
• 关键词: Intrinsic; Interactions; Between; Superconductivity; Magnetism

This award supports a project to investigate the interplay between two "hostile" states, superconductivity and magnetism. The project will be carried out in collaboration with leading scientists in the Ukraine. The rare-earth-nickel-borocarbide family of compounds which exhibit a wealth of related phenomena and a system of ruthenocuprates which appear to show coexistence of magnetism and superconductivity at temperatures as high as 50K have been chosen for the study. Important length scales can be changed by introduction of point defects. This will be done by both chemical substitution and irradiation with high energy electrons in order to separate the effects related to physical disorder from those related to chemical "pressure". The research will address the role of pair breaking mechanisms in the region of coexistence of superconductivity and magnetism, the nature of exotic electronic states in this region and the anomalies in normal state transport in these magnetic superconductors. The results are expected to be of general applicability to the understanding of the interplay between superconductivity and magnetism, valid well beyond the particular material chosen. Students will receive training that will prepare them for careers in industry, academia or government. The close contact and interaction with leading scientists from another country will provide new perspectives on science and culture for these students. In addition a student from Texas Agriculture and Mining University will have the opportunity to perform research overseas in the Ukraine.This research project, a joint effort by the principle investigator and leading scientists in Ukraine, will investigate the intricate interplay between "hostile" physical states, namely magnetism and superconductivity. Two families of compounds, rare-earth-nickel-borocarbides and ruthenocuprates, which show an unusual variety of phenomena related to these two states have been chosen for the studies. The effects of disorder, introduced both by chemical substitution and irradiation with high energy electrons, on the interplay will be studied. The interplay between superconductivity and magnetism is a fundamental problem in solid state physics, and the results of this investigation are expected to lead to a much better understanding of this interplay that will be applicable beyond the chosen materials. Students will have the opportunity to collaborate with leading international scientists while learning state-of-the art technology and experimental skills. In addition a student from Texas Agriculture and Mining University will have the opportunity to perform research overseas in the Ukraine.

该奖项支持一个项目，以调查两个“敌对”状态，超导性和磁性之间的相互作用。 该项目将与乌克兰的主要科学家合作进行。稀土-镍-硼碳化物家族的化合物，表现出丰富的相关现象和一个系统的xenocuprates似乎显示共存的磁性和超导性在温度高达50 K已被选择的研究。 重要的长度尺度可以通过引入点缺陷来改变。 这将通过化学取代和高能电子辐照来完成，以便将与物理无序有关的效应与与化学“压力”有关的效应分开。 该研究将解决对断裂机制在超导和磁性共存区域中的作用，该区域中奇异电子态的性质以及这些磁性超导体中正常态传输的异常。 这些结果预计将普遍适用于理解超导性和磁性之间的相互作用，有效性远远超出所选择的特定材料。 学生将接受培训，为他们在工业，学术界或政府的职业生涯做好准备。 与来自另一个国家的顶尖科学家的密切接触和互动将为这些学生提供科学和文化的新视角。此外，德克萨斯农业和矿业大学的学生将有机会在乌克兰进行海外研究。该研究项目由乌克兰的主要研究人员和领先科学家共同努力，将调查“敌对”物理状态之间的复杂相互作用，即磁性和超导性。两个家庭的化合物，稀土镍硼碳化物和nickenocuprates，这表明了一个不寻常的各种现象有关的这两个国家已被选定的研究。 将研究由化学取代和高能电子辐照引入的无序对相互作用的影响。 超导性和磁性之间的相互作用是固态物理学中的一个基本问题，这项研究的结果有望更好地理解这种相互作用，这种相互作用将适用于所选材料之外。 学生将有机会与国际领先的科学家合作，同时学习最先进的技术和实验技能。此外，来自德克萨斯州农业和矿业大学的学生将有机会在乌克兰进行海外研究。