Open AccessАмплитудные зависимости диэлектрических потерь в тонкопленочном наногранулированном композите (x)Ni-(1-x)PZT
Author(s) -
А. В. Калгин,
И.Ю. Кобяков
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.06.50934.012
Subject(s) - condensed matter physics , materials science , dielectric , curie temperature , ferroelectricity , electric field , field (mathematics) , composite number , composite material , physics , ferromagnetism , mathematics , optoelectronics , quantum mechanics , pure mathematics
At temperatures Т below the ferroelectric Curie point and various strengths of a constant electric field E=, the dependences of dielectric losses tgδ in a thin-film nanogranular composite (x)Ni – (1 –x)[Pb0.81Sr0.04(Na0.5Bi0.5)0.15][(Zr0.575Ti0.425)]O3 on the strength of an alternating electric field E~ were studied. It was found that tgδ almost does not vary with increasing E~ up to the strength of some threshold field Et and smoothly increases at E~ > Et. The value of Et decreases as Т increases while x and E= decreases. The observed dependences of tgδ(E~) and Et on Т, x, and E= are explained in terms of the model of interaction of domain boundaries with pinning point defects in ferroelectrics