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Spectroscopic and transport properties of Ba‐ and Ti‐doped BaLaInO 4
Author(s) -
Tarasova N.,
Galisheva A.,
Animitsa I.
Publication year - 2021
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.6078
Subject(s) - dopant , ionic conductivity , ionic bonding , oxygen , doping , acceptor , materials science , conductivity , solid solution , interstitial defect , inorganic chemistry , vacancy defect , crystal structure , ion , analytical chemistry (journal) , chemistry , crystallography , electrolyte , electrode , condensed matter physics , metallurgy , organic chemistry , physics , optoelectronics
In this work, the local structure of the acceptor Ba 1+ х La 1– х InO 4–0.5 х and donor BaLaIn 1– х Ti х O 4+0.5 х doped solid solutions based on BaLaInO 4 was investigated. The appearance of new types of the defects (oxygen vacancy and oxygen interstitial) in the crystal lattice was confirmed by the spectroscopic investigations. It was shown that for both solid solutions the same tendency of the increase in the symmetry of the structure and the expansion of interlayer space with increasing dopant concentration is observed. The changes in the transport properties (ionic conductivity) have the same tendency for both solid solutions. The increase in the oxygen‐ionic and protonic conductivity in the area of “low” dopant concentrations ( x < 0.05) is due to the increase in the mobility of ions caused by the influence of geometric factor. The decrease in the ionic conductivity values in the area of “high” dopant concentrations ( x > 0.05) is caused by the appearance of interaction between defects (concentration factor). The most conductive ionic (oxygen‐ionic and protonic) material with Ruddlesden–Popper (RP) structure based on BaLaInO 4 is Ba 1.1 La 0.9 InO 3.95 composition.