Издателям
Вышедшие номера
Magnetic resonance in PbxNbyOz-ceramics as a system containing chemical fluctuation regions
Vikhnin V.S.1, Asatryan H.R.1, Zakharchenya R.I.1, Kutsenko A.B.1, Kapphan S.E.2
1A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia
2FB Physik, Universitat Osnabruck, Osnabruck, Germany
Email: hike.asatryan@mail.ioffe.ru
Выставление онлайн: 20 июля 2005 г.

The simulation of chemical fluctuation regions in the PMN-like relaxors by growth of the PbxNbyOz-ceramics was performed. Different PbxNbyOz-clusters (chemically and structurally) coexist in such a ceramics. Hole polarons and bi-polarons, "Cr3+ --- two polaronic holes" paramagnetic complexes were considered for an explanation of EPR spectra in PbxNbyOz-ceramics. Dynamical averaging and light induced effects, and significant effects of reduction treatment giving a co-existence of Nb5+ and Nb3+ ions as well as of strong internal magnetic field were discovered in such a ceramics. The latter could be related to antiferromagnetic phase realization in PbxNbyOz-clusters containing high enough concentration of magnetic Nb3+ host lattice ions. Such a situation leads to antiferromagnetic resonance on Nb3+ ions as well as to EPR of Cr3+-related paramagnetic complexes in Nb3+-induced internal magnetic field. Charge transfer vibronic excitons (CTVE) in free and in CTVE-phase states were detected in PbxNbyOz-ceramics by photoluminescence studies. Supported in part by RFBR (03-02-17589), and by Programs "Low dimension quantum structures" and "Spin-dependent effects in solids and spintronics".
  • L. E. Cross. Ferroelectr. 76, 241 (1987); 151, 305 (1994)
  • Y. Yan, S.J. Pennycook, Z. Xu, D. Viehland. Appl. Phys. Lett. 72, 3145 (1998)
  • V.S. Vikhnin, R.I. Eglitis, S. Kapphan, E.A. Kotomin, G. Borstel. Europhys. Lett. 56, 5, 702 (2001)
  • V.S. Vikhnin, R.I. Eglitis, S.E. Kapphan, G. Borstel, E.A. Kotomin. Phys. Rev. B 65, 104 304 (2002)
  • V.S. Vikhnin, S.E. Kapphan, R.I. Eglitis, R. Pirc. Phys. Stat. Sol. (c) 2, 1, 120 (2004)
  • V.S. Vikhnin, R.I. Zakharchenya, H.R. Asatryan, A.B. Kutsenko, S.E. Kapphan. Applied Magnetic Resonanse 28, 1, 1 (2005)
  • V.S. Vikhnin, R.I. Zakharchenya, H.R. Asatryan, A.B. Kutsenko, S.E. Kapphan, H. Eickmeyer. Ferroelectrics, 307, 67 (2004)
  • T. Okamura, Y. Torizuka, Y. Kojima. Phys. Rev. 82, 285 (1951)
  • C. Kittel. Phys. Rev. 82, 565 (1951)
  • Подсчитывается количество просмотров абстрактов ("html" на диаграммах) и полных версий статей ("pdf"). Просмотры с одинаковых IP-адресов засчитываются, если происходят с интервалом не менее 2-х часов.

    Дата начала обработки статистических данных - 27 января 2016 г.