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

Ferromagnetic composite EuO:Fe for the semiconductor spintronics: The mechanisms of high magnetization

Magnetic and nuclear gamma resonance (NGR) parameters of EuO:Fe composites are studied. Their properties really meet the requirements imposed on the use of them as spin injectors in semiconductor spin-electronic structures capable of operating under normal conditions at room temperatures

Superparamagnetism of the ferromagnetic composite material EuO:Fe for spintronics

The results of a study of the magnetic, NGR and other parameters of EuO:Fe composites, which really meet the requirements imposed on the use of them as spin injectors in the developed semiconductor spin-electronic structures capable of operating under normal conditions at room temperatures, are reported. The manifestation of superparamagnetism in these composites is established. Copyright © 2008 American Scientific Publishers. All rights reserved