Mössbauer spectroscopy study of the EuO:Fe spintronic material

The states of iron and europium in the EuO:Fe composite spintronic material have been studied by means of room-temperature Mössbauer spectroscopy. In both cases, two sets of lines indicating the ferromagnetism and superparamagnetism of metallic iron nanoparticles in the composite and the appearance of a fraction of europium ions in the Eu3+ oxidation state in the matrix in addition to the main Eu2+ state have been observed in the respective spectra. In the europium case, the observation implies the possibility of a partial spin polarization of paramagnetic europium ions in Eu-Fe-O clusters and an increased specific magnetization of the composite. © 2009 Pleiades Publishing, Ltd

Modification of monosilicon solar cells parameters by hydrogen plasma treatment

An overview of the influence of hydrogen plasma treatment on monocrystalline silicon solar cells (SCs) parameters (efficiency, diffusion length of minority carriers L, spectral response 1{Л)) was investigated. Moreover the Influence of prehydrogenation on radiation hardness of such SCs was studied. It is shown that hydrogenation of SCs at the appropriate processing regimes leads to the increase both efficiency and radiation hardness