Open AccessЭлектрофизические свойства поликристаллических пленок BiFe-=SUB=-0.95-=/SUB=-Co-=SUB=-0.05-=/SUB=-O-=SUB=-3-=/SUB=-
Author(s) -
О.Б. Романова,
В.В. Кретинин,
S. S. Aplesnin,
М.Н. Ситников,
Л.В. Удод,
К.И. Янушкевич -=SUP=--=SUP=-
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.06.50928.015
Subject(s) - magnetoresistance , condensed matter physics , magnetization , superparamagnetism , materials science , cobalt , scattering , relaxation (psychology) , giant magnetoresistance , colossal magnetoresistance , doping , atmospheric temperature range , magnetic field , physics , optics , metallurgy , psychology , social psychology , quantum mechanics , meteorology
Semiconductor BiFe0.95Co0.05O3 thin-film compounds were obtained by a flare technique. The surface morphology of the films and the effect of electronic doping by replacing trivalent iron with cobalt ions on the structural, optical, magnetic, and kinetic properties in the temperature range 77-600 K in magnetic fields up to 12 kOe are studied. The existence of two relaxation channels in the impedance spectrum at frequencies of 0.1–1000 kHz has been established. The negative magnetoresistance in the anomalous magnetization region and the maximum magnetoimpedance in the vicinity of the surface phase transition has been found. Using the Hall effect measurements, carrier types prevailing in the magnetoresistance and magnetoimpedance effects has been found. The magnetization anomalies are explained using the model of superparamagnetic clusters and the magnetoresistance is attributed to the scattering of carriers by the spin fluctuations.