Giant electric field modulation of double exchange ferromagnetism at room temperature in the perovskite manganite/titanate p-n junction.

Physical review letters · 2002 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3922

In a (La0.9Ba0.1)MnO3/Nb-doped SrTiO3 p-n junction, the metal-insulator transition temperature (corresponding to the ferromagnetic transition) was modulated from 290 K to 340 K as bias voltage increased from +1.0 V to +1.8 V. Magnetoresistance was also electr…

Study snapshot

PublicationPhysical review letters · 2002

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

We report on the electrical modulation of double exchange ferromagnetism at room temperature in hole-doped manganites of a metal oxide p-n junction. In this (La0.9Ba0.1)MnO(3)/Nb doped SrTiO3 p-n junction, the temperature dependence of the junction resistance shows a metal-insulator transition whose temperature, corresponding to that of ferromagnetic transition, is hugely modulated from 290 to 340 K by a bias voltage increasing from +1.0 to +1.8 V. The magnetoresistance can also be modulated electrically.

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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 typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Ferromagnetic transition temperature modulation
Metal-insulator transition temperature modulation
Junction resistance temperature dependence
Magnetoresistance modulation

Limitations

No biological/health outcomes described (materials physics study).
No sample size or replication details provided in the abstract.
Exposure metrics relevant to EMF health research (frequency, field strength, SAR, duration) are not reported.

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "bias voltage in metal oxide p-n junction",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Ferromagnetic transition temperature modulation",
    "Metal-insulator transition temperature modulation",
    "Junction resistance temperature dependence",
    "Magnetoresistance modulation"
  ],
  "main_findings": "In a (La0.9Ba0.1)MnO3/Nb-doped SrTiO3 p-n junction, the metal-insulator transition temperature (corresponding to the ferromagnetic transition) was modulated from 290 K to 340 K as bias voltage increased from +1.0 V to +1.8 V. Magnetoresistance was also electrically modulated.",
  "effect_direction": "unclear",
  "limitations": [
    "No biological/health outcomes described (materials physics study).",
    "No sample size or replication details provided in the abstract.",
    "Exposure metrics relevant to EMF health research (frequency, field strength, SAR, duration) are not reported."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electric field modulation",
    "double exchange ferromagnetism",
    "perovskite manganite",
    "titanate",
    "p-n junction",
    "(La0.9Ba0.1)MnO3",
    "Nb-doped SrTiO3",
    "metal-insulator transition",
    "magnetoresistance",
    "room temperature"
  ],
  "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: 10.1103/physrevlett.88.027204
PubMed: 11801033

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