Repozytorium publikacji - Politechnika Gdańska

We report details on the synthesis and properties of barium praseodymium tungstate, Ba2PrWO6, a double perovskite that has not been synthesized before. Room-temperature (RT) powder X-ray diffraction identified the most probable space group (SG) as monoclinic I2/m, but it was only slightly distorted from the cubic structure. X-ray photoelectron spectroscopy confirmed that the initial (postsynthesis) material contained praseodymium in both 3+ and 4+ charge states. The former (Pr3+) disappeared after exposure to UV light at RT. Photoluminescence studies of Pr3+ revealed that Ba2PrWO6 is an insulator with a band gap exceeding 4.93 eV. Pressure-dependent Raman spectroscopy excluded the possibility of a phase transition up to 20 GPa; however, measurements between 8 and 873 K signified that there might be a change toward the lower symmetry SG below 200 K. Electron paramagnetic resonance spectra revealed the presence of interstitial oxygen which acts as a deep electron trap.

Autorzy

• Damian Włodarczyk,
• Mikolaj Amilusik,
• Katarzyna M. Kosyl,
• Maciej Chrunik,
• Krystyna Ławniczak-Jabłońska,
• Hanka Przybylińska,
• dr inż. Paulina Kosmela link otwiera się w nowej karcie ,
• dr hab. inż. Michał Strankowski link otwiera się w nowej karcie ,
• Lev-Ivan Bulyk,
• Volodymyr Tsiumra,
• Rajibul Islam,
• Carmine Autieri,
• Fei Xue,
• dr inż, Marcin Zając,
• Anastasiia Lysak,
• Roman Minikayev,
• Michal Bockowski,
• Andrzej Suchocki