Comment on "Point defect structure of La-doped SrTiO3 ceramics with colossal permittivity". (1st January 2021)

• Record Type: Journal Article
• Authors: Tkach, Alexander; Okhay, Olena
• Is Part Of: Scripta materialia. Number 190(2021)
• Page Start: 38
• Page End: 39
• Publication Date: 2021-01-01
• Subjects: SrTiO3 ceramics -- Doped dielectrics -- Perovskite structure -- Giant permittivity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.08.032
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: With this contribution, as a comment to the publication in Acta Materialia 164 (2019) 76, reporting point defect structure and giant dielectric response in La-doped strontium titanate ceramics, we show that the reported ceramics should have a strong effect of O vacancies instead of possessing displaced Ti, Ti vacancies and Schottky defects within their crystal lattice and therefore suggested mechanisms for the giant permittivity response have to be reconsidered. Some data analysis are also found to be contradictive to the literature or incomplete.