Naslov
INFLUENCE OF Ho DOPING ON STRUCTURAL AND MAGNETIC BEHAVIOUR OF MULTIFERROIC BiFeO3

Autori
Čebela, Maria ; Šenjug, Pavla ; Torić, Filip ; Skoko, Željko ; Zagorac, Dejan ; Pajić, Damir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Programme and Book of Abstracts of The Fifth Conference of The Serbian Society for Ceramic Materilas / - , 2019, 108-108

Skup
5th Conference of the Serbian Society for Ceramic Materials

Mjesto i datum
Beograd, Srbija, 11.06.2019. - 13.06.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bismuth ferrite ; Multiferoics ; Magnetoelectric effect

Sažetak
Magnetoelectric multiferroics, showing simultaneous ferroelectricand ferromagnetic ordering, have aroused wide attention in recent years, because they offer a wide range of potential applications in data storage media, spintronics and multi-state memories. The influence of Ho doping on the crystal structure and magnetic properties of bismuth ferrite(BFO) nanopowders was investigated. BiFeO3 and Bi1-xHoxFeO3 ultrafine nanopowders were synthesized by the hydrothermalmethod. Here we use simple, low-cost and energy-saving hydrothermal method, which has advantages over the conventional methods. The diffraction pattern was recorded at room temperature and atmospheric pressure in the absence of any re-heating of the sample. A fitting refinement procedure using the Rietveld method was performed which showed the incorporation of Ho3+ ions in the BiFeO3 crystal lattice, where they substitute Bi3+ ions. All the samples belong to R3c space group. In addition, theoretical investigation using bond valence calculations have been performed in order to mimic pure and Ho doped BiFeO3 compounds produced in the experiment. Various BFO polymorphs were investigated as function of holmium concentration and final optimization of crystal structures has been performed on ab initio level using Density Functional Theory (DFT). Magnetic behaviour of synthesized materials was investigated by SQUID magnetometer in wide temperature interval (2–800 K). Splitting between the zero-field-cooled and field-cooled magnetization curves becomes more pronounced as the Ho concentration is increased, pointing to the development of weak ferromagnetic moment, which is usually connected with uncompensated spins or spin canting. Hysteresis loops show the same fact, attaining higher magnetization with more Ho included, and becoming wider, i.e.magnetically harder.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA