Abstract
In the construction of BL07A beamline, in order to conform to the requests of the energy range from 5 kev to 23kev, the highest flux, the lowest high harmonic waves and the best energy resolution. I have taken all kinds of Monochromators to compared with each other as well as consider the impact of size limit of mirror and the reflectivity in different materials and incident angles. I found the better incident angle is 3.5mrad and the coatings of Collimating Mirror are one half of nothing, a half of Pt25nm+Rh5nm and Pt25nm+Rh5nm for Focusing Mirror. The beam size is 2.5E-2cm*2.8E-2cm . The energy resolution is 1.43E-04 at 5kev with increase to 2.90E-04 at 23kev. The flux is in the highest limit with 7.60E+12 from 7kev to 9kev and in the lowest value with 2.73E+11 at 23 kev. In the analysis of samples with X ray, we want to know the size effect with any properties such as magnetism, K value...etc, the lattice and the local structure of different size ZrO2 and ZrO2 doped Fe、Co、Ni or other atoms. We have done the only one size ZrO2 and the ZrO2 doped Ni with Zr:44.7wt% to Ni5.61wt%. I found that the 3.6 nm ZrO2 is Tetragonal different from the Monoclinic with bulk ZrO2 at room temperature. The EXAFS shows four oxygen vacancy at 2.38A. I am not sure how it happened. ZrO2 doped Ni also shows four oxygen vacancy at 2.38A and Ni or NiO are found around Zr in no substitution of Zr. There is no answer whether bulk ZrO2 is ferromagnetic or not at room temperature at present. One thinks d0 Oxide compounds could be if there is oxygen vacancy or doping which makes energy band of oxygen splitting but the others do not. The k value of tetragonal ZrO2 is 35. The influence of oxygen vacancy could be calculated.