Year: 2025
Type: article
Abstract: Complex perovskite oxides stabilized under high-pressure conditions constitute a rich playground for material science thanks to their multifunctional properties. Here we present the synthesis of BiCu0.4Mn0.6O3, obtained under isotropic high-pressure/high-temperature conditions. The compound crystallizes in the orthorhombic Pbam space group with a = 5.57960(16) Å, b = 11.2374(3) Å, c = 7.6603(2) Å. Disorder between Cu and Mn cations at the B site causes a significant interplay between electric and magnetic properties. Although a long-range magnetic order is not observed in neutron diffraction, BiCu0.4Mn0.6O3 displays a ferromagnetic-like transition at 330 K confined at the local scale and thermal-activated semiconductive behavior. At lower temperatures, the partial electronic localization on the Mn site changes the transport mechanism leading to 3D variable range hopping conductivity and determines the formation of an antiferromagnetic ordering at about 30 K. The presence of ferromagnetic-like room temperature state makes this material intriguing as a starting point for advanced multifunctional devices. High-pressure high-temperature synthesis of perovskites can stabilize highly distorted and metastable compounds to ambient conditions, allow tuning of various physical properties. Here, BiCu0.4Mn0.6O3 is synthesized under high-pressure high temperature conditions, showing antiferromagnetic order at low temperatures and a ferromagnetic-like state at room temperature.
Source: Communications Materials
Institutions: University of Parma, Institute of Materials for Electronics and Magnetism, National Research Council, Rutherford Appleton Laboratory, Science and Technology Facilities Council, ISIS Neutron and Muon Source, University of Padua, Institute of Condensed Matter Chemistry and Technologies for Energy
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,690
OpenAlex ID: W4409530073