Synthesis and magnetic properties of polycrystalline films of Co x Fe y Cr3 - x - y O4 and Cr2O3/CoFe2O4 multiferroics
Magnetic properties of first obtained polycrystalline films of FeCr2O4, CoCr2O4, and CoFe0.5Cr1.5O4 multiferroics and films of a Cr2O3/CoFe2O4 composite multiferroic have been studied. In particular, magnetization curves and temperature dependences of the magnetic moment of the samples were measured in the temperature range 4.2-300 K in fields of up to 10 kOe. It was shown that the Curie point of a multiferroic depends on its cation composition. It was found that an exchange bias of the hysteresis loop exists in films of the Cr2O3/CoFe2O4 composite multiferroic at temperatures below the Néel point of Cr2O3 (330 K).