ACTA

Magnetic Properties of the Bi_0.65La_0.35Fe_0.5Sc_0.5O₃ Perovskite

A.V. Fedorchenko^a,b, E.L. Fertman^b, V.A. Desnenko^b, O.V. Kotlyar^b, E. Čižmár^a, V.V. Shvartsman^c, D.C. Lupascu^c, S. Salamon^d, H. Wende^d, A.N. Salak^e, D.D. Khalyavin^f, N.M. Olekhnovich^g, A.V. Pushkarev^g, Yu.V. Radyush^g, and A. Feher^a
^aInstitute of Physics, Faculty of Sciences, P.J. Safarik University, Park Angelinum 9, 041 54 Košice, Slovakia
^bB. Verkin Institute for Low Temperature Physics and Engineering of NASU, Kharkov 61103, Ukraine
^cInstitute for Materials Science and CENIDE, University of Duisburg-Essen, Essen 45141, Germany
^dFaculty of Physics and CENIDE, University of Duisburg-Essen, Duisburg 47048, Germany
^eUniversity of Aveiro (CICECO), Aveiro 3810-193, Portugal
^fSTFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
^gScientific-Practical Materials Research Centre of NASB, Minsk 220072, Belarus

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Magnetic properties of polycrystalline multiferroic Bi_0.65La_0.35Fe_0.5Sc_0.5O₃ synthesized 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 T_N ≈ 220 K. Magnetic hysteresis loops taken below T_N show a huge coercive field up to H_c ≈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 T_N ≈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.

DOI: 10.12693/APhysPolA.131.1069
PACS numbers: 75.85.+t, 75.60.Ej, 75.60.-d, 75.50.Ee