Synthesis Crystallographic, and Magnetic Properties of New Nitrided Hard Magnetic Materials

新型氮化硬磁材料的合成晶体学及磁性能

• 批准号: 9214271
• 负责人: Gary Long
• 金额: $ 30万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9214271&HistoricalAwards=false
• 关键词: Synthesis; Crystallographic; Magnetic; Properties; New

The effects of interstitial nitrogen on the crystal and magnetic structures of new rare earth-iron-nitrogen magnets as well as the effects of cobalt nickel, manganese, aluminum, and silicon substitution for iron in these nitrided compounds will be studied. Neutron diffraction will be used to determine preferential occupancies of the substitutional elements on the different sites in crystal structure. Both neutron diffraction and Mossbauer spectroscopy will be used to determine the magnetics structures of these compounds and to reveal the detailed magnetic behavior at each of the different iron sites as a function of synthetic methods and processing techniques. The microscopic structural information from neutron diffraction and Mossbauer spectroscopy will be correlated with bulk properties as determined by magnetic measurements. Understanding in detail how the interstitial nitrogen and substitutional elements affect the iron and rare earth magnetic interactions will be an important step towards developing even better magnets.

间隙氮对晶体结构和磁性的影响 新的稀土-铁-氮磁体的结构以及 钴镍、锰、铝和硅的影响 将研究在这些氮化化合物中取代铁。 中子衍射将用于确定优先 不同位点上替代元素的占有率 在晶体结构中。 中子衍射和穆斯堡尔谱 光谱学将用于确定的磁性结构 这些化合物，并揭示详细的磁性行为， 每个不同的铁位点作为合成方法的函数 和加工技术。 显微结构信息 从中子衍射和穆斯堡尔谱将是 与由磁性测定的体相性质相关 测量. 详细了解填隙式 氮和替代元素影响铁和稀土 磁相互作用将是发展 更好的磁铁