Putu Eka Dharma Putra, Resky Irfanita, Agus Purwanto, Malik Anjelh Baqiya, Krongthong Kamonsuangkasem, Chatree Saiyasombat, Andon Insani, Suasmoro, Sri Yani Purwaningsih, Darminto
Structural analysis and observation of the oxygen migration of Pr2-xCexCuO4+δ (PCCO) with Ce-doping concentration, x, of 0 and 0.15 powders are briefly studied through neutron diffraction (ND) patterns and x-ray absorption spectroscopy (XAS) spectrum in the extended x-ray absorption fine structure (EXAFS) range. The PCCO powders are synthesized using the chemical dissolved technique and time-dependent oxygen-reduction annealing in flowing Ar atmosphere. All powders show a stable PCCO phase with tetragonal T′-type crystal structure (space group of I4/mmm) for both the as-prepared and partially oxygen-reduced PCCO powders at room temperature. Occupancy of the apical oxygen, O(3), is detected higher in the doped powders due to Ce-doping effect and generally increases after the shorter-time oxygen-reduction annealing. The decrease of O(3) occupancy is observed for the longer-time reduction annealing process indicating a trace of oxygen migration and recovery of oxygen defect on CuO2 plane in the T′-structure. This study is essential to elucidate the mechanism of oxygen removal in the electron-doped cuprates. © 2022 Elsevier B.V.
Institute of Materials and Optoelectronic Science, National Sun Yat-sen University (NSYSU), No. 70, Lienhai Rd., Kaohsiung, 80424, Taiwan; Department of Physics, Institut Teknologi Sepuluh Nopember (ITS), ITS Campus, Keputih Sukolilo, Surabaya, 60111, Indonesia; Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Makassar, Jalan Daeng Tata Raya, Makassar, 90223, Indonesia; PT. Cipta Mikro Material, TBIC, PUSPIPTEK, BRIN, Pengasinan, Gn Sindur, Jawa Barat, Bogor, 16340, Indonesia; Synchrotron Light Research Institute, 111 University Avenue, Muang District, Nakhon Ratchasima, 30000, Thailand; Research Center for Radiation Detection and Nuclear Analysis Technology, Nuclear Energy Research Organization, BRIN, Gedung 43, Puspiptek Serpong, Banten, Tangerang Selatan, 15310, Indonesia
