.sup.93./sup.Nb NMR and Fe.sup.3+./sup. EPR study of local magnetic properties of magnetoelectric Pb(Fe.sub.1/2./sub.Nb.sub.1/2./sub.)O.sub.3./sub..

0349840 - FZÚ 2011 RIV GB eng J - Článek v odborném periodiku
Laguta, Valentyn - Rosa, Jan - Jastrabík, Lubomír - Blinc, R. - Cevc, P. - Zalar, B. - Remškar, M. - Raevskaya, S. I. - Raevski, I. P.
⁹³Nb NMR and Fe³⁺ EPR study of local magnetic properties of magnetoelectric Pb(Fe_1/2Nb_1/2)O₃.
Materials Research Bulletin. Roč. 45, č. 11 (2010), 1720-1727. ISSN 0025-5408. E-ISSN 1873-4227
Grant CEP: GA MŠMT(CZ) 1M06002
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: Pb(Fe_1/2Nb_1/2)O₃ * nuclear magnetic resonance (NMR) * EPR * microstructure
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.145, rok: 2010

The 93Nb NMR and Fe3+ EPR spectra of a magnetoelectric Pb(Fe1/2Nb1/2)O3 (PFN) single crystal as well as of PFN ceramics and nanopowder have been measured. The relation between the chemical disorder and the local magnetic structure has been determined. The data show the occurrence of an antiferromagnetic (AFM) phase transition at 145 and 135 K in both single crystal and ceramic samples, respectively. The AFM phase transition is however essentially smeared out in the nanopowder. Two different Nb sites exist which have different local magnetic fields which are essentialy distributed in value.
Trvalý link: http://hdl.handle.net/11104/0189977