Phase transition from DyCrO4 to DyCrO3: magnetic behavior and structural reorganization

This study examines the phase transition from DyCrO4 to DyCrO3, focusing on the magnetic behavior and structural reorganization of these compounds. The research involves synthesizing polycrystalline DyCrO4 and DyCrO3 using the sol–gel method and characterizing them through various techniques such as X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and magnetic measurements using a superconducting quantum interference device-based vibrating sample magnetometer (SQUID-VSM). The study reveals that DyCrO4 undergoes a phase transition to DyCrO3 at higher temperatures, with the phase transition temperatures determined through extensive XRD data analysis. The magnetic properties of DyCrO4 and DyCrO3 are thoroughly investigated, showing paramagnetic behavior at higher temperatures and distinct magnetic transitions at lower temperatures. The study also highlights the unique negative magnetization phenomenon in DyCrO3 at higher magnetic fields, providing insights into the magnetic interactions between Dy3+ and Cr3+ ions. The detailed analysis of the phase transition and magnetic properties offers valuable insights into the behavior of these compounds under different conditions.