Chemical disorder and Pb-207 hyperfine fields in the magnetoelectric multiferroic Pb(Fe.sub.1/2./sub.Sb.sub.1/2./sub.)O.sub.3./sub. and its solid solution with Pb(Fe.sub.1/2./sub.Nb.sub.1/2./sub.)O.sub.3./sub.

0500472 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Zagorodniy, Yu.O. - Kuzian, R. O. - Kondakova, I.V. - Maryško, Miroslav - Chlan, V. - Štěpánková, H. - Olekhnovich, N.M. - Pushkarev, A.V. - Radyush, Yu.V. - Raevski, I. P. - Zalar, B. - Laguta, Valentyn - Stephanovich, V. A.
Chemical disorder and Pb-207 hyperfine fields in the magnetoelectric multiferroic Pb(Fe_1/2Sb_1/2)O₃ and its solid solution with Pb(Fe_1/2Nb_1/2)O₃.
Physical Review Materials. Roč. 2, č. 1 (2018), s. 1-13, č. článku 014401. ISSN 2475-9953. E-ISSN 2475-9953
Grant CEP: GA ČR GA13-11473S
Institucionální podpora: RVO:68378271
Klíčová slova: multiferroics * nuclear magnetic resonance * spin glass
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.926, rok: 2018

We report on the results of magnetic susceptibility, electron paramagnetic resonance, and 207Pb nuclear magnetic resonance (NMR) studies of the magnetoelectric multiferroic Pb(Fe1/2Sb1/2)O3 (PFS) ceramic, as well as its solid solution with Pb(Fe1/2Nb1/2)O3 of different degrees of the 1:1 ordering of magnetic Fe3+ and nonmagnetic Sb5+ ions. The ordering has been studied by x-ray diffraction (XRD) and NMR methods. The analysis of experimental data in terms of density functional theory reveals a noticeably higher hybridization between Pb 6s and Fe 3d orbitals in the ordered case. The ordering of magnetic and nonmagnetic ions has a strong impact on the magnetic properties of PFS, leading to a transformation of the long-range ordered antiferromagnetic phase in chemically ordered samples to the spin glass state already in partially (s = 0.35) disordered specimens.
Trvalý link: http://hdl.handle.net/11104/0292536