Synchrotron X-Ray Absorption Spectroscopy (XAS) Studies on Structural and Magnetic Properties of T’-Pr2-xCexCuO4 Nanocrystals

• Published in: Key engineering materials Vol. 855; pp. 128 - 133
• Main Authors: Baqiya, Malik Anjelh, Irfanita, Resky, Triono, Bambang, Putra, Putu Eka Dharma, Darminto, Darminto, Kamonsuangkasem, Krongthong, Saiyasombat, Chatree
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.07.2020
• Subjects: Annealing; Argon; Atomic properties; Coordination numbers; Cuprates; Fine structure; Magnetic properties; Magnetism; Nanocrystals; Oxygen; Reduction; Synchrotron radiation; X ray absorption; T’-PCCO; Nanocrystals; Electron-Doped; Oxygen Vacancy; EXAFS
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/www.scientific.net/KEM.855.128

We have succeeded in synthesizing electron-doped cuprates T’-Pr2-xCexCuO4 (PCCO) with x = 0 and 0.10 nanocrystals prepared by the chemically dissolved method. Reduction annealing of the PCCO samples at 700°C under a flowing argon gas atmosphere has been performed for the removal of excess oxygen in the apical sites. The XRD data showed that the reduction annealing process decreases c-axis length indicating successful removal of the excess oxygen. The bond distortion of PCCO including coordination number and bond distance between the absorber atoms with the nearest neighboring atoms (Cu-O) was investigated by extended x-ray absorption fine structure (EXAFS) using Cu K-edge. The implication of our results is discussed on the basis of tremendous influence of oxygen vacancies on the magnetism of the nanosized T’-cuprates at the normal state.