In-situ investigation of the phase behavior of binary iron germanide FeGe in the temperature range 500-800 °C

The proposed project is a part of our systematic investigations of binary systems containing transtition metal and main group element, including crystal structure determination, phase transitions study, physical properties measurements, chemical bonding calculations. The results obtained at ESRF and specially at ID22 contributed successfully to these studies (e.g. proposals HS4271, HS4823, HC3349). The aim of the present proposal is in-situ investigation of phase and structural behaviour of FeGe in the temperature range 500850 C in order to understand the mechanism of the structural transition in this system. The preliminary investigations gave us indications that the existence ranges, phase transition behavior and peculiarities of the crystal structures of three modifications of FeGe deviate from those reported in the literature