Study defects formation mechanism in La1-xBaxMnO3 perovskite manganite by positron annihilation lifetime and Doppler broadening spectroscopy
Jabarov S.H. Nabiyeva A.K. Samadov S.F. Abiyev A.S. Sidorin A.A. Trung N.V.M. Orlov O.S. Mauyey B. Trukhanov S.V. Trukhanov A.V. Mirzayev M.N.
October 2024Elsevier B.V.
Solid State Ionics
2024#414
In this study, La1-xBaxMnO3 (x = 0.03, 0.27, 0.5) solid solutions were synthesized, and their structure and defect incorporation processes were investigated. The investigations were conducted using XRD, Positron Annihilation Lifetime, and Doppler Broadening Spectroscopy methods. Depending on the La/Ba ratio, the mechanism of defect incorporation in these compounds was studied, and vacancies of La and Ba atoms in the structure were determined. Three lifetime components are observed in PALS investigations. An increase in x results in a decrease in all three lifetime components. The results indicate that an increase in x leads to the formation of 0D (anion and cation point vacancies) and 3D (lattice distortions and interplanar distances) defects in the structure. Doppler Broadening results reveal a decrease in open volume defects and the presence of cationic defects.
Crystal structure , DBS , Doped perovskites , PALS , Point defects , Structure defects , Vacancy
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Institute of Physics, Ministry of Science and Education Republic of Azerbaijan, Baku, AZ-1143, Azerbaijan
Institute of Radiation Problems, Ministry of Science and Education Republic of Azerbaijan, Baku, АZ-1143, Azerbaijan
International Intergovernmental Organization Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Khazar University, Baku, AZ-1096, Azerbaijan
Western Caspian University, Baku, AZ-1001, Azerbaijan
Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, 10000, Viet Nam
L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Laboratory of Magnetic Films Physics, SSPA “Scientific and Practical Materials Research Centre of NAS of Belarus”, Minsk, 220072, Belarus
Smart Sensor Systems Laboratory, Department of Electronic Materials Technology, National University of Science and Technology MISiS, Moscow, 119049, Russian Federation
Azerbaijan Technical University, Baku, AZ1073, Azerbaijan
Institute of Physics
Institute of Radiation Problems
International Intergovernmental Organization Joint Institute for Nuclear Research
Khazar University
Western Caspian University
Institute of Physics
L.N. Gumilyov Eurasian National University
Laboratory of Magnetic Films Physics
Smart Sensor Systems Laboratory
Azerbaijan Technical University
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