Elastic and Magnetic Properties of Tweed

材料研究部向马里兰州大学帕克分校颁发的这一更新奖项旨在研究铁磁形状记忆合金（FSMA）高温相的剪切弹性各向同性和磁性能的分散性，其中已经观察到或可能发生粗花呢。 凭借这一奖项，Wuttig教授将通过在国家设施运行的明亮X射线源上进行时间分辨衍射研究，对FSMA中弹性色散的结构起源进行实验研究，特别是Fe“70 Pd“30。 还将确定感兴趣的磁性形状记忆合金的立方相中所有弹性常数的真实的和虚部的完全温度和磁场依赖性，并且这些研究将用结构信息来增强。 这些实验将提供建模的输入参数，这将促进对感兴趣的合金的弹性和滞弹性以及相关的磁响应函数的全面理解。与马里兰州首屈一指的科学磁铁高中之一的合作，该项目将试图提高工程科学的形象，特别是在学生中的材料科学。 计划开展的活动包括：a）通过与一两名学生就本项目的各个方面进行合作来树立榜样，以及B）培养他们，使他们能够撰写科学论文，并为他们在英特尔竞赛中竞争做好准备。这些活动的成果之一将是增加本科工程课程的学生入学人数。

This renewal award by the Division of Materials Research to University of Maryland College Park is to study the dispersion of the shear elastic isotropy and magnetic properties in the high temperature phase of ferromagnetic shape memory alloys (FSMAs), where tweed has been observed or is likely to occur. With this award, Professor Wuttig will be experimentally investigating the structural origin of the elastic dispersion in FSMAs, particularly Fe"70Pd"30, by time resolved diffraction studies at a bright X-ray source operated by national facilities. Complete temperature and magnetic field dependence of the real and imaginary parts of all elastic constants in the cubic phase of magnetic shape memory alloys of interest will also be determined, and these studies will be augmented with structural information. These experiments would provide the input parameters for modeling that would promote an overall understanding of the elasticity and anelasticity as well as related magnetic response functions of the alloys of interest.With the cooperation of one of Maryland's premier science magnet high schools, the project would attempt to enhance the image of engineering sciences in general and materials science in particular among students. The planned activities include: a) creating role model(s) by working with one or two students on aspects of this project, and b) nurturing them so that they will be able to write a scientific papers and prepare them to compete well in the Intel competition. One of the outcomes of these activities would be increased enrollment of students in undergraduate engineering programs.