Raman spectroscopic detection of vacancies in LaFeO3

被引：14

作者：

Eymeoud, Paul ^{[1
]}

Turquat, Christian ^{[1
]}

Pardanaud, Cedric ^{[2
]}

Leroux, Christine ^{[1
]}

Merlen, Alexandre ^{[1
]}

机构：

[1] Univ Toulon & Var, Aix Marseille Univ, CNRS, IM2NP, Toulon, France

[2] Aix Marseille Univ, CNRS, PIIM, Marseille, France

来源：

MATERIALS LETTERS | 2023年 / 330卷

关键词：

Lanthanum orthoferrite; Vacancies; Raman spectroscopy; Density Functional Theory; OXYGEN VACANCIES; LA; CONDUCTIVITY; CRYSTALS;

D O I：

10.1016/j.matlet.2022.133296

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By coupling Raman measurements and first-principles investigations on bulk lanthanum orthoferrite (LaFeO3), we have demonstrated that the Raman peak around 620 cm -1 usually observed in these samples is a signature of vacancies within the material. This Raman peak can be used as a fast and non-destructive detection test, to determine whether a LaFeO3 sample contains a non-negligible quantity of vacancies. Finally, using first-principles calculations, we propose an infrared spectroscopic method to differentiate the chemical nature of vacancies (oxygen, iron, or lanthanum).

引用

页数：4

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