Open AccessSynthesis, microstructure and effect of high pressures on transport properties of GdBaCo2O5,5
Author(s) -
Т. Н. Тарасенко,
AUTHOR_ID,
T. S. Sivachenko,
I. Yu. Reshidova,
В. В. Бурховецкий,
A. Mazur,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
trudy kolʹskogo naučnogo centra ran
Language(s) - English
Resource type - Journals
ISSN - 2307-5252
DOI - 10.37614/2307-5252.2021.2.5.050
Subject(s) - cobaltite , materials science , electrical resistivity and conductivity , microstructure , hysteresis , crystallite , condensed matter physics , phase transition , relaxation (psychology) , thermodynamics , composite material , metallurgy , physics , psychology , social psychology , quantum mechanics
In polycrystalline samples of double layered cobaltite GdBaCo2O5.5 the structure and resistivity at the first order “insulator-metal” (I-M) phase transition were studied at normal and high pressures. The strong dependence of the shape of the temperature hysteresis loop on the rate of temperature change indicates an infra-slow thermal relaxation of conductivity. Baric studies have shown an increase in the transition temperature ТIM at increasing pressure P with baric coefficient dТIM/dP ≈ 10 K/GPa. The spin blockade model is used to explain the observed effects.