The Laser-Mossbauer Method

该项目由杜肯大学的一名女科学家领导，这是一所主要的本科院校。研究目的是了解激光辐照过程中非晶态和其他介质中微结构相成核和生长的机理和控制因素。这项工作将增加我们对包括玻璃铁磁体在内的各种材料的准分子激光加工的理解。本项目将建立一种方法，通过影响磁性材料晶体之间的磁耦合，使磁性材料的性质从软到硬。将获得激光辐射与部分和完全结晶金属玻璃相互作用的基本效应的新信息，并将通过透射和转换电子穆斯堡尔能谱、直流磁滞回线和交流磁化率测量的联合应用来研究控制热退火金属玻璃的磁织构和相平衡的可能性。这项研究将涉及本科生和研究生的新颖研究活动，并将对杜肯大学的科学基础设施产生重大影响。该项目包括购买一种新的准分子激光器，这对拟议的研究至关重要。这个项目是由一名女科学家在杜肯大学主要的本科教育环境。该研究采用激光加工和穆斯堡尔光谱的新组合，通过微结构加工生产新材料。该项目包括购买一种新的准分子激光器，这对拟议的研究至关重要。激光脉冲诱导有纹理材料的微观结构变化，从而改变材料的磁性和其他特性。研究将集中在非晶材料，特别是非晶磁性材料感兴趣的信息存储行业。该项目将涉及本科生和研究生的创新研究项目，涉及材料制备、穆斯堡尔光谱和原位激光加工。＊＊＊

Sorescu 9800753 This project is led by a female scientist at Duquesne University, a primarily undergraduate institution. The research goals are to understand and correlate the mechanisms and controlling factors of the nucleation and growth of micro-structural phases in amorphous and other media during laser irradiation treatment. The work will add to our understanding of excimer laser processing of a wide range of materials, including glassy ferromagnets. This project will establish methodology to tune magnetic materials properties from soft to hard, by affecting the magnetic coupling between their crystallites. New information on the fundamental effects underlying the interaction of laser radiation with partially and completely crystallized metallic glasses will be obtained, and the possibility of controlling the magnetic texture and phase equilibrium in thermally-annealed metallic glasses will be examined by combined application of transmission and conversion electron Mossbauer spectroscopy, dc hysteresis loops and ac magnetic susceptibility measurements. The research will involve undergraduate and graduate students in novel research activities and will have a significant impact on the scientific infrastructure at Duquesne University. The project includes the purchase of a new excimer laser that is essential for the proposed research. %%% This project is by a female scientist at the predominantly undergraduate educational environment at Duquesne University. The research employs a novel combination of laser processing and Mossbauer spectroscopy to produce new materials via micro- structural processing. The project includes the purchase of a new excimer laser that is essential for the proposed research. The laser pulse induces micro-structural changes in textured materials and this modifies the magnetic and other properties of the materials. The research will focus on amorphous materials, particularly amorphous magneti c materials of interest to the information storage industry. The project will involve both undergraduate and graduate students in innovative research projects dealing with materials preparation, Mossbauer spectroscopy, and in situ laser processing. ***