SGER: Ceramic Artificial Ferrite Prepared by Laser Ablation

SGER：激光烧蚀制备陶瓷人造铁氧体

• 批准号: 0226544
• 负责人: Carmine Vittoria
• 金额: $ 8.61万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0226544&HistoricalAwards=false
• 关键词: SGER; Ceramic; Artificial; Ferrite; Prepared

A novel laser-ablation deposition technique will be used to deposit high quality multiplayers of magnetic oxides at the atomic scale. The purpose is to synthesize single crystal films of the spinel structure in which one layer consists solely of Mn2+ ions and the other alternating layer of only Fe3+ ions. Although the average chemical composition is that of MnFe2O4, the magnetic structure is that of a normal ferrite in a spinel structure. The magnetic structure of MnFe2O4 grown by the natural process is that of an inverse magnetic structure, in which both Fe3+ and Mn2+ can be found in the same layer, for example. Thus, this technique allows for the growth of ferrites by artificial control.The implication of the success of this technique is enormous. Scientifically, we will be able to test fundamental theories of magnetism directly instead of depending what natural process allows. It also means that one can engineer ferrites for various applications and technical needs. Magnetic sensors will be improved to the point that it will impact medical imaging techniques, computer memories (speed and size), and the wireless communication components. In summary, a new generation of ferrite materials will be established, which will have impact in all phases of technology.

一种新的激光烧蚀沉积技术将被用于在原子尺度上沉积高质量的磁性氧化物多层膜。目的是合成尖晶石结构的单晶膜，其中一层仅由Mn2+离子组成，另一层仅由Fe3+离子组成。虽然平均化学成分是MnFe2O4，但磁结构是尖晶石结构中的普通铁氧体。例如，自然法生长的MnFe2O4的磁结构是逆磁结构，其中Fe3+和Mn2+都可以在同一层中找到。因此，这项技术允许通过人工控制铁氧体的生长。这项技术的成功意义是巨大的。科学上，我们将能够直接测试磁学的基本理论，而不是依赖于自然过程允许的。这也意味着人们可以根据不同的应用和技术需求来设计铁氧体。磁性传感器将得到改进，它将对医学成像技术、计算机存储器(速度和大小)以及无线通信组件产生影响。综上所述，新一代铁氧体材料将被建立，它将对技术的各个阶段产生影响。