Elastic and Magnetic Properties of Tweed

这项由马里兰大学材料研究部授予的更新奖是为了研究铁磁形状记忆合金（fsma）高温相中剪切弹性各向同性和磁性的色散，在那里已经观察到或可能发生粗花呢。获得该奖项后，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，实验研究fsma中弹性色散的结构起源，特别是Fe“70Pd”30。我们还将确定感兴趣的磁形状记忆合金的三相中所有弹性常数的实部和虚部对温度和磁场的完全依赖关系，并将利用结构信息来扩充这些研究。这些实验将为建模提供输入参数，这将促进对感兴趣合金的弹性和非弹性以及相关磁响应函数的全面理解。通过与马里兰州一所一流的科学磁铁高中的合作，该项目将试图提高工程科学，特别是材料科学在学生中的形象。计划的活动包括：a)通过与一到两个学生在这个项目的各个方面合作，创造榜样；b)培养他们，使他们能够写一篇科学论文，并为他们在英特尔竞赛中竞争做好准备。这些活动的结果之一将是增加本科工程专业学生的入学率。

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.