Quantitative determination of domain distribution in SrTiO3-competing effects of applied electric field and mechanical stress.

Journal of physics. Condensed matter : an Institute of Physics journal · 2010 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3298

Study snapshot

PublicationJournal of physics. Condensed matter : an Institute of Physics journal · 2010

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Below its ordering temperature at 105 K, perovskite-type SrTiO(3) exhibits a tetragonal phase with three different structural domains that are strongly influenced by the application of uniaxial mechanical stresses and electric fields. A careful neutron diffraction study of superlattice reflections provides full quantitative information about the varying domain distributions under external loads as a function of temperature. It is shown that electric field and uniaxial stress exhibit competitive effects and the simultaneous application leads to a complex redistribution behaviour of the tetragonal domains. The results are discussed in the context of the formation of a field induced ferroelectric phase at low temperatures. The experimental findings demonstrate that its polarization is always perpendicular to the tetragonal axis and the polar phase has orthorhombic symmetry.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Neutron diffraction measurements below 105 K provided quantitative domain distributions in tetragonal SrTiO3 under applied uniaxial stress and electric field. Electric field and uniaxial stress showed competitive effects, and simultaneous application produced complex redistribution of tetragonal domains. Findings were discussed in relation to a field-induced ferroelectric phase at low temperatures, with polarization reported as perpendicular to the tetragonal axis and the polar phase having orthorhombic symmetry.

Outcomes measured

Structural domain distribution in tetragonal SrTiO3 under external loads (electric field and uniaxial stress)
Evidence regarding field-induced ferroelectric (polar) phase symmetry and polarization orientation at low temperatures

Limitations

No exposure parameters for the electric field (e.g., magnitude, waveform/frequency) are provided in the abstract.
No sample size or number of measurements/specimens is stated in the abstract.
This is a materials/physics study rather than a biological or health-effects study.

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "applied electric field",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Structural domain distribution in tetragonal SrTiO3 under external loads (electric field and uniaxial stress)",
    "Evidence regarding field-induced ferroelectric (polar) phase symmetry and polarization orientation at low temperatures"
  ],
  "main_findings": "Neutron diffraction measurements below 105 K provided quantitative domain distributions in tetragonal SrTiO3 under applied uniaxial stress and electric field. Electric field and uniaxial stress showed competitive effects, and simultaneous application produced complex redistribution of tetragonal domains. Findings were discussed in relation to a field-induced ferroelectric phase at low temperatures, with polarization reported as perpendicular to the tetragonal axis and the polar phase having orthorhombic symmetry.",
  "effect_direction": "unclear",
  "limitations": [
    "No exposure parameters for the electric field (e.g., magnitude, waveform/frequency) are provided in the abstract.",
    "No sample size or number of measurements/specimens is stated in the abstract.",
    "This is a materials/physics study rather than a biological or health-effects study."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "SrTiO3",
    "strontium titanate",
    "tetragonal domains",
    "domain distribution",
    "neutron diffraction",
    "uniaxial stress",
    "electric field",
    "field-induced ferroelectric phase",
    "orthorhombic symmetry",
    "polarization"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1088/0953-8984/22/23/235903
PubMed: 21393772

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