共查询到7条相似文献,搜索用时 3 毫秒
1.
利用X射线衍射的方法及磁性测量手段研究了R2Fe17-xCrx(R=Y,Dy,x≤3)化合物,给出了其居里点的变化情况,即随x的增大,居里温度增大,在x近似为1.0时达到最大值。利用分子场理论计算了磁交换作用系数并从磁交换作用出,对其居里温度的变化情况进行了分析。 相似文献
2.
LIN He DUAN Haiming 《科学通报(英文版)》2006,51(13):1546-1550
Modern electronic devices utilize the charge degree of freedom of electrons to process information in semiconductors and the spin degree of freedom to store information in magnetic materials. For example, inte- grated circuits and high–frequency devices … 相似文献
3.
应用X-射线衍射确定RMn6Sn6(R=Nd,Sm)的结构和晶格参数。使用多种磁学仪器测量化合物的热磁曲线,磁化曲线等磁性能。 相似文献
4.
采用LanL2DZ基组,对簇合物「M6S8(PEt3)6」^n模型「M6S8(PH3)6」^n(M=Cr,Mo,W;n=-1,0,+1)进行从头计算研究,探讨该类簇合物的电子结构特征及其与性质的关系,研究不同金属原子对该类簇合物结构的影响、各原子之间相互作用对形成簇骼的影响等。 相似文献
5.
Electronic structure and chemical reaction of Ca deposition on resiore8ular poly(3-hexylthiophene) surfaces 总被引:1,自引:0,他引:1
Conjugated polymer, regioregular poly(3-hexylthiophene) (rr-P3HT), films were prepared by spin-coating the rr-P3HT chloroform solution onto clean silicon wafer surfaces. The chemical re- action and electronic structure of Ca deposition on rr-P3HT surfaces were in situ investigated by synchrotron radiation photoemission spectroscopy (SRPES) and X-ray photoemission spectros- copy (XPS). Upon Ca deposition, Ca-induced band bending of rr-P3HT is observed. In addition, Ca atoms preferentially react with S atoms of rr-P3HT. No obvious reaction between Ca and C atoms can be found. Through the investigation of the evolution of valence band spectra and secondary electron cut-off of rr-P3HT during the process of Ca deposition, an energy level alignment diagram at the Ca/rr-P3HT interface is derived. 相似文献
6.
采用密度泛函方法系统研究了D3h V3O-3和C3Nb3O-3 δ和π双重芳香性体系的几何和电子结构,并将其作为配体引入C3v[M3O3]A(A=Li,Na)和D3h[M3O3]B[M3O3](B=Ca,Sr)金属夹心化合物.V3O-3和Nb3O-3具有与已经实验确认的δ-芳香性D3h Ta3O-3类似的几何结构和成键性质. 相似文献
7.
LIANG Yangang & JIN Guoxin Laboratory of Molecular Catalysis Innovative Material Department of Chemistry Fudan University Shanghai China 《科学通报(英文版)》2004,49(12):1236-1240
Early transition metal catalysts containing twophenoxy-imine ligands, called FI catalysts which havevery high potential to become a new generation of olefinpolymerization catalysts, are new-type catalysts whichhave attracted much attention in recent years[1—3]. Many ofthem display activities comparable to those of the metal-locene catalysts and, in some cases, behave as living po-lymerization catalysts of α-olefins. Brookhart and Gibsonet al.[4,5] recently reported separately series of Schi… 相似文献