Mr. Leszek Ruchomski is a researcher affiliated with Politechnika Lubelska (Lublin University of Technology), Poland, with expertise in materials science, crystallography, and functional oxide materials, particularly multiferroic and magnetoelectric systems. His research focuses on structure–property relationships in complex oxides, including the effects of chemical doping on crystal structure and spin ordering, as exemplified by his work on La-doped BiFeO₃. According to Scopus, he has authored 9 peer-reviewed publications that have received 62 citations across 54 citing documents, reflecting steady international visibility, with an h-index of 6. He has collaborated with at least 17 co-authors, indicating active engagement in multidisciplinary and international research networks. His contributions support the development of advanced functional materials with potential impact on energy-efficient electronics, sensing technologies, and next-generation multifunctional devices.