M 88 Mössbauer Spectroscopy Study of the EuO:Fe Spintronic Material / A. S. Borukhovich, N. I. Ignat’eva, K. I. Yanushkevich, A. I. Stognij, Yu. A. Fedotova // JETP Letters. - 2009. - Vol. 89, № 4. - P191-193 : il. - Bibliogr. : p. 193 (8 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): МЕССБАУЭРОВСКАЯ СПЕКТРОСКОПИЯ -- ОКСИД ЕВРОПИЯ Аннотация: 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 Полный текст |