Magnetic Properties of the Bi0.65La0.35Fe0.5Sc0.5O3 Perovskite

Magnetic properties of polycrystalline multiferroic Bi0.65La0.35Fe0.5Sc0.5O3synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions were studied using a SQUID magnetometer technique.The temperature dependent static magnetic moment M was measured in both zero-field-cooled and field-cooled modes over the temperature range of 5-300 K in low magnetic field H = 0.02 kOe.The field dependent magnetization M (H) was measured in magnetic fields up to 50 kOe at different temperatures up to 230 K after zero-field cooling procedure.A long-range magnetic ordering of the antiferromagnetic type with a weak ferromagnetic contribution takes place below TN ≈ 220 K. Magnetic hysteresis loops taken below TN show a huge coercive field up to Hc ≈ 10 kOe, while the magnetic moment does not saturate up to 50 kOe.A strong effect of magnetic field on the magnetic properties of the compound has been found.Below TN ≈ 220 K the derivatives of the initial magnetization curves demonstrate the existence of a temperature-dependent anomaly in fields of H = 15 ÷ 25 kOe.The nature of the anomaly is unknown and requires additional study.