%0 Journal Article %T Analyse of structural and electrical properties of NaBa((2-x))Nd-2x/3Nb5O15 solid solution with (0 < x <1) %+ Université Abdelhamid Ibn Badis de Mostaganem %+ Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 (LPMC) %+ Laboratoire de Chimie des Matériaux Solides %+ Université de Picardie Jules Verne (UPJV) %+ Laboratoire de Modélisation des Systèmes Energétiques (LMSE) %A Belarbi, M. %A Benyoussef, Manal %A Tamraoui, Y. %A Manoun, B. %A Cantaluppi, A. %A Favry, D. %A Taibi, K. %A El Marssi, M. %A Lahmar, A. %< avec comité de lecture %@ 0254-0584 %J Materials Chemistry and Physics %I Elsevier %V 277 %8 2022 %D 2022 %R 10.1016/j.matchemphys.2021.125513 %Z Physics [physics]/Condensed Matter [cond-mat]Journal articles %X The structural and electrical properties of NaBa(2-x)Nd2x/3Nb5O15 ceramics were reported. All samples were prepared by the conventional solid-state reaction. A Room temperature X-ray study has allowed identifying the stabilization of tetragonal Tungsten Bronzes (TTB) structure with P4bm as space group for low Nd3+ concentration, whereas a centrosymmetric space group P4/mbm has been revealed for the high concentration. The dielectric study carried out on the prepared ceramics showed that the studied system undergo a behavior change from normal ferroelectric to a relaxor one with the increasing Neodymium amount. The complex impedance spectroscopy highlighted a thermally activated relaxation process in our samples. A short-range relaxation is proposed for x = 0.3 sample, while a possible coexistence of both localized and long-range relaxation for x = 1. Further, the Nyquist plot of the impedance is given for the low and higher Nd3+ samples and a simple model is proposed to fit the results. %G English %L hal-03608398 %U https://u-picardie.hal.science/hal-03608398 %~ UNIV-PICARDIE %~ U-PICARDIE %~ LPMC-UPJV