The shape of the Kβ line in the emission spectra of iron has been investigated for Fe2O3, Fe3O4 and lithium ferrite aluminates. Two clearly defined low energy Kβ satellites were observed. The positions of the satellite lines were explained as being due to plasmon excitations of some electrons in atoms forming the crystalline lattice. These oscillations occur independently for groups of atoms belonging to different lattice positions.

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Zustandsdichte und der angenommenen Zahl von Elektronen fur reines Eisen iindern den charakteristischen Gang der pFe-x-Abhangigkeit nicht.

PACS: 78.70.En Two low energy satellites of the iron K b line were observed in the spectra of DyFe 2 , DyFe 3 , Dy 2 Fe 17 , YDyFe 17 and Y 2 Fe 17 , and were interpreted as plasmon modes excited in the crystalline lattice. Peak energies were successfully fitted within the electronic collective excitation model specific to the crystal and electronic structures of related compounds.

The compositional dependence of the DTA curves was analyzed for FexCoTa-xSigB13 metallic glasses. The crystallization temperature were determined. The results suggest that the thermal stability rises with increasing iron content.Metallic glasses containing cobalt are the subject of intense investigations due to interesting thermal, mechanical and magnetic properties [1][2][3]. They are thermodynamically unstable and a basic parameter describing their thermal stability is the crystallization temperature. In this work we determined the crystallization temperature DTA analysis. The investigated samples were cobalt-iron metallic glasses in a wide range of compositions. ExperimentalFexCo78-xSi9B13 metallic glass was prepared in the form of a ribbon about 2 cm wide, by rapid quenching, for x = 0, 4, 8, 18, 28, 38, 62, 66. The material has been cut into pieces of about 1 square millimeter, then mixed with A1203 powder in the weight ratio 1:1 and milled in an electromagnetic mortar during 20 minutes. Thermal analysis has been performed using a derivatograph Q-1500D apparatus is the temperature range from 20 ~ to 1000 ~ and different heating rates ~ = 21, 10.8, 5.4, 2.8, 1.3 deg/min.The analyzed material was placed in small open platinum crucibles. The samples were investigated under a flowing argon atmosphere.