caa a22 4500 605546118 CHVBK 20210128100939.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00723-015-0643-x doi (NATIONALLICENCE)springer-10.1007/s00723-015-0643-x Structure and Metastability of MF2 (M=Ca,Sr,Ba) Fine Powders Mechanochemically Doped with Er3+ Ions [Elektronische Daten] [I. Irisova, A. Kiiamov, S. Korableva, A. Rodionov, D. Tayurskii, R. Yusupov] In the paper thermal treatment investigations of the MF2 (M=Ca,Sr,Ba) fine powders mechanochemically doped with Er3+ ions using electron paramagnetic resonance and X-ray diffraction are presented. It is shown that the prepared samples are found in the nonequilibrium metastable state characterized bythe high concentration of the cationic vacancies and prevalence of the cubic symmetry-doped Er3+ ion centers. Vacancies formed when the deformation exceeds the elastic limit serve both as the means for a nonlocal charge compensation and a route for mechanically activated diffusion. Annealing brings the powders to the ground state with the most of the vacancies healed and the trigonal symmetry of the impurity Er3+ centers in SrF2 and BaF2 due to the local compensation by the interstitial fluorine ion. Springer-Verlag Wien, 2015 Irisova I. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut Kiiamov A. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut Korableva S. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut Rodionov A. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut Tayurskii D. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut Yusupov R. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut Applied Magnetic Resonance Springer Vienna 46/5(2015-05-01), 515-522 0937-9347 46:5<515 2015 46 723 https://doi.org/10.1007/s00723-015-0643-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-015-0643-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Irisova I. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut NATIONALLICENCE 700 1- Kiiamov A. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut NATIONALLICENCE 700 1- Korableva S. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut NATIONALLICENCE 700 1- Rodionov A. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut NATIONALLICENCE 700 1- Tayurskii D. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut NATIONALLICENCE 700 1- Yusupov R. Kazan Federal University, Kremlevskaya 18, 420008, Kazan, Russia aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/5(2015-05-01), 515-522 0937-9347 46:5<515 2015 46 723