项目名称: Fe-Ga合金中3d电子、超精细作用及其磁致伸缩效应研究
项目编号: No.11264002
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 熊定康
作者单位: 广西大学
项目金额: 58万元
中文摘要: 测量Fe-Ga合金的符合正电子湮没辐射多普勒展宽谱和寿命谱,研究合金中的微观缺陷、电子密度、3d电子行为;探索化学成分与合金元素对Fe-Ga合金中微观缺陷、电子密度和d-p电子相互作用的影响。分析Fe-Ga合金的穆斯堡尔谱,获取合金的超精细相互作用信息。用迈克尔逊干涉方法测量Fe-Ga合金的磁致伸缩系数。研究微观缺陷、电子密度、d-p电子相互作用和内磁场对Fe-Ga合金磁致伸缩性能的影响,从深层次因素讨论Fe-Ga合金磁致伸缩效应的微观机理。
中文关键词: Fe-Ga合金;3d电子;相互作用;正电子湮没;磁致伸缩
英文摘要: The defects, electron density and the behavior of 3d electrons of Fe-Ga alloys will be studied by means of the positron lifetime and coincidence Doppler broadening of positron annihialtion radiation spectrum measurements. The influences of chemical compositions and alloying elements on the microdefects, electronic densities and the d-p electron interactions of Fe-Ga alloys will be investigated. The hyperfine interactions of Fe-Ga alloys will be obtained by analysing the Mossbauer spectra. The coefficients of megnetostriction of Fe-Ga alloys will be measured by a Michelson's interferometer. The effect of microdefects, electronic densities, the d-p electron interactions and the inner magnetic field on the megnetostriction property of Fe-Ga alloy will be investigated. The micro-mechanism of the megnetostriction effect of Fe-Ga alloy will be discussed by using the concept of electronic structure.
英文关键词: Fe-Ga alloys;3d electrons;interaction;positron annihilation;magnetostriction