Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

Crystals

Alexey V. Fedorchenko¹  Elena L. Fertman¹  Andrei N. Salak²  Andrius Stanulis³  Andrew R. Barron³  Dmitry D. Khalyavin⁴  Erik Čižmár⁵  Serhii Vorobiov⁵  Alexander Feher⁵  Yury V. Radyush⁶  Anatoli V. Pushkarev⁶  Nikolai M. Olekhnovich⁶ 

[1] B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine (NASU), Nauky 47, Kharkiv 61103, Ukraine;Department of Materials and Ceramics Engineering/CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, Portugal;Energy Safety Research Institute (ESRI), Swansea University, Bay Campus, Fabian Way, Swansea, SA1 8EN, UK;ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK;Institute of Physics, Faculty of Sciences, P. J. Šafárik University, Park Angelinum 9, Košice 041 54, Slovakia;Scientific-Practical Materials Research Centre of the National Academy of Sciences of Belarus (NASB), P. Brovka 19, Minsk 220072, Belarus;

关键词: high-pressure synthesis;    conversion polymorphism;    oxygen octahedral tilting;    G-type antiferromagnetic;    weak ferromagnetism;    collinear magnetic ground state;   

DOI  :  10.3390/cryst10100950

来源: DOAJ

【 摘 要 】

Magnetic properties of the high-pressure stabilized perovskite BiFe_1-ySc_yO₃ phases (0.1 ≤ y ≤ 0.9) have been studied by means of magnetization measurements and neutron diffraction. The metastable perovskites of this series undergo irreversible polymorphic transformations upon annealing, the phenomenon referred to as conversion polymorphism. It has been found that the solid solutions with y ≥ 0.70 exhibit no long-range magnetic ordering regardless of their polymorph modification, while those with y ≤ 0.60 are all antiferromagnets. Depending on the scandium content, temperature and structural distortions, three types of the antiferromagnetic orderings, involving collinear, canted and cycloidal spin arrangements, have been revealed in the phases obtained via conversion polymorphism and the corresponding magnetic phase diagram has been suggested.

【 授权许可】

Unknown