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A Partial Anion Disorder in SrVO2H Induced by Biaxial Tensile Strain
- Source :
- Inorganics, Volume 8, Issue 4, Inorganics, Vol 8, Iss 26, p 26 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- SrVO2H, obtained by a topochemical reaction of SrVO3 perovskite using CaH2, is an anion-ordered phase with hydride anions exclusively at the apical site. In this study, we conducted a CaH2 reduction of SrVO3 thin films epitaxially grown on KTaO3 (KTO) substrates. When reacted at 530 &deg<br />C for 12 h, we observed an intermediate phase characterized by a smaller tetragonality of c/a = 0.96 (vs. c/a = 0.93 for SrVO2H), while a longer reaction of 24 h resulted in the known phase of SrVO2H. This fact suggests that the intermediate phase is a metastable state stabilized by applying tensile strain from the KTO substrate (1.4%). In addition, secondary ion mass spectrometry (SIMS) revealed that the intermediate phase has a hydrogen content close to that of SrVO2H, suggesting a partially disordered anion arrangement. Such kinetic trapping of an intermediate state by biaxial epitaxial strain not only helps to acquire a new state of matter but also advances our understanding of topochemical reaction processes in extended solids.
- Subjects :
- order–disorder
Materials science
oxyhydrides
Hydride
thin film
Substrate (chemistry)
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
lcsh:QD146-197
0104 chemical sciences
Ion
Inorganic Chemistry
Secondary ion mass spectrometry
Crystallography
epitaxial strain
Phase (matter)
Metastability
lcsh:Inorganic chemistry
Intermediate state
SrVO2H
0210 nano-technology
cis/trans configuration
Perovskite (structure)
Subjects
Details
- Language :
- English
- ISSN :
- 23046740
- Database :
- OpenAIRE
- Journal :
- Inorganics
- Accession number :
- edsair.doi.dedup.....47f37b068e1b64b3c738455bbc223a1b
- Full Text :
- https://doi.org/10.3390/inorganics8040026