abstract
Magnetic properties of new multiferroic BiFe0.5Sc0.5O3 perovskite which exists in two different orthorhombic polymorphs, the antipolar Pnma and the polar Ima2, were studied using a SQUID-magnetometer technique in magnetic fields up to 50 kOe in the temperature range of 5-300 K. Both polymorphs show a weak ferromagnetic component below the Neel temperature, T-N similar to 220 K. A wide cusp-like anomaly of the temperature dependent magnetic susceptibility was revealed below 200 K. The anomaly is dependent on the magnetic field applied and can be associated with the glassy magnetic behavior of the compound. The best fit of the initial magnetization curves taken at each temperature can be obtained as a sum of two contributions, namely the nonlinear in field and the linear one. The nonlinear contribution appeared to be temperature and magnetic field dependent, which is in a good agreement with the magnetization experimentally obtained as a function of temperature in different magnetic fields applied. Increase of external magnetic field leads to a decrease of the nonlinear contribution to the total magnetic moment
keywords
FERROELECTRICITY; MULTIFERROICS; BISMUTH
subject category
Materials Science; Physics
authors
Fedorchenko, AV; Fertman, EL; Salak, AN; Desnenko, VA; Cizmar, E; Feher, A; Vaisburd, AI; Olekhnovich, NM; Pushkarev, AV; Radyush, YV; Zarkov, A; Kareiva, A
our authors
Andrei Salak
Principal Researcheracknowledgements
This work was supported by project TUMOCS. This project has received funding from European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 645660. Also this work was supported by the Slovak Research and Development Agency under contract No. APVV-14-0073, and A. V. Fedorchenko thanks P. J. Safarik University in Kosice for the opportunity to carry out research.