Probing electrocolored Fe-doped SrTiO3 bulks using optical second harmonic generation

D. Ascienzo; S. Greenbaum; T. J.M. Bayer; C. A. Randall; Y. H. Ren

doi:10.1016/j.actamat.2017.01.007

Probing electrocolored Fe-doped SrTiO₃ bulks using optical second harmonic generation

D. Ascienzo, S. Greenbaum, T. J.M. Bayer, C. A. Randall, Y. H. Ren

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

We have investigated the spatial distribution of non-centrosymmetric defects in the electrocolored bulks of oxidized and reduced Fe-doped SrTiO₃ (Fe:STO) single crystals by optical second harmonic generation (SHG) spectroscopy in the transmission geometry. Transmitted SHG intensities were examined across the anodic, mixed, and cathodic bulk regions of both Fe:STO crystals. The obtained nonlinear susceptibility ratios show that the structural distortions in the anodic and cathodic bulks of the electrocolored crystals are dominated by Fe:Ti[sbnd]O bond bending around Fe⁴⁺ defect centers and Fe:Ti[sbnd]O bond stretching around Fe³⁺ defect centers, respectively. Moreover, we identified a stronger local strain field at the color front of the oxidized crystal over the reduced one. This is attributed to more efficient strain relaxation during oxygen vacancy demixing in the reduced crystal.

Original language	English (US)
Pages (from-to)	520-527
Number of pages	8
Journal	Acta Materialia
Volume	126
DOIs	https://doi.org/10.1016/j.actamat.2017.01.007
State	Published - Mar 1 2017

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2017.01.007

Cite this

@article{2bca6bc33c304776abccc942e40b5c2e,

title = "Probing electrocolored Fe-doped SrTiO3 bulks using optical second harmonic generation",

abstract = "We have investigated the spatial distribution of non-centrosymmetric defects in the electrocolored bulks of oxidized and reduced Fe-doped SrTiO3 (Fe:STO) single crystals by optical second harmonic generation (SHG) spectroscopy in the transmission geometry. Transmitted SHG intensities were examined across the anodic, mixed, and cathodic bulk regions of both Fe:STO crystals. The obtained nonlinear susceptibility ratios show that the structural distortions in the anodic and cathodic bulks of the electrocolored crystals are dominated by Fe:Ti[sbnd]O bond bending around Fe4+ defect centers and Fe:Ti[sbnd]O bond stretching around Fe3+ defect centers, respectively. Moreover, we identified a stronger local strain field at the color front of the oxidized crystal over the reduced one. This is attributed to more efficient strain relaxation during oxygen vacancy demixing in the reduced crystal.",

author = "D. Ascienzo and S. Greenbaum and Bayer, {T. J.M.} and Randall, {C. A.} and Ren, {Y. H.}",

note = "Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

year = "2017",

month = mar,

day = "1",

doi = "10.1016/j.actamat.2017.01.007",

language = "English (US)",

volume = "126",

pages = "520--527",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Probing electrocolored Fe-doped SrTiO3 bulks using optical second harmonic generation

AU - Ascienzo, D.

AU - Greenbaum, S.

AU - Bayer, T. J.M.

AU - Randall, C. A.

AU - Ren, Y. H.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - We have investigated the spatial distribution of non-centrosymmetric defects in the electrocolored bulks of oxidized and reduced Fe-doped SrTiO3 (Fe:STO) single crystals by optical second harmonic generation (SHG) spectroscopy in the transmission geometry. Transmitted SHG intensities were examined across the anodic, mixed, and cathodic bulk regions of both Fe:STO crystals. The obtained nonlinear susceptibility ratios show that the structural distortions in the anodic and cathodic bulks of the electrocolored crystals are dominated by Fe:Ti[sbnd]O bond bending around Fe4+ defect centers and Fe:Ti[sbnd]O bond stretching around Fe3+ defect centers, respectively. Moreover, we identified a stronger local strain field at the color front of the oxidized crystal over the reduced one. This is attributed to more efficient strain relaxation during oxygen vacancy demixing in the reduced crystal.

AB - We have investigated the spatial distribution of non-centrosymmetric defects in the electrocolored bulks of oxidized and reduced Fe-doped SrTiO3 (Fe:STO) single crystals by optical second harmonic generation (SHG) spectroscopy in the transmission geometry. Transmitted SHG intensities were examined across the anodic, mixed, and cathodic bulk regions of both Fe:STO crystals. The obtained nonlinear susceptibility ratios show that the structural distortions in the anodic and cathodic bulks of the electrocolored crystals are dominated by Fe:Ti[sbnd]O bond bending around Fe4+ defect centers and Fe:Ti[sbnd]O bond stretching around Fe3+ defect centers, respectively. Moreover, we identified a stronger local strain field at the color front of the oxidized crystal over the reduced one. This is attributed to more efficient strain relaxation during oxygen vacancy demixing in the reduced crystal.

UR - http://www.scopus.com/inward/record.url?scp=85009888021&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85009888021&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2017.01.007

DO - 10.1016/j.actamat.2017.01.007

M3 - Article

AN - SCOPUS:85009888021

SN - 1359-6454

VL - 126

SP - 520

EP - 527

JO - Acta Materialia

JF - Acta Materialia

ER -

Probing electrocolored Fe-doped SrTiO₃ bulks using optical second harmonic generation

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this