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Spin-Crossover Materials towards Microwave Radiation Switches.

Scientific reports · 2016 · Mixed · Insufficient evidence

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MixedInsufficient evidencePaper 6585

Spin-crossover complexes showed different microwave absorption/attenuation properties between high-spin and low-spin states during the thermal transition. Absorption and reflection coefficients were higher in the high-spin state than in the low-spin state, su…

Study snapshot

PublicationScientific reports · 2016
Study typeengineering
Reported directionMixed
Evidence ratingInsufficient

Abstract

Microwave electromagnetic radiation that ranges from one meter to one millimetre wavelengths is finding numerous applications for wireless communication, navigation and detection, which makes materials able to tune microwave radiation getting widespread interest. Here we offer a new way to tune GHz frequency radiation by using spin-crossover complexes that are known to change their various physical properties under the influence of diverse external stimuli. As a result of electronic re-configuration process, microwave absorption properties differ for high spin and low spin forms of the complex. The evolution of a microwave absorption spectrum for the switchable compound within the region of thermal transition indicates that the high-spin and the low-spin forms are characterized by a different attenuation of electromagnetic waves. Absorption and reflection coefficients were found to be higher in the high-spin state comparing to the low-spin state. These results reveal a considerable potential for the implementation of spin-crossover materials into different elements of microwave signal switching and wireless communication.

Machine Enhanced Logic

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 directionmixed
PopulationNot supplied
Sample sizeNot supplied
Exposuremicrowave
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Spin-crossover complexes showed different microwave absorption/attenuation properties between high-spin and low-spin states during the thermal transition. Absorption and reflection coefficients were higher in the high-spin state than in the low-spin state, suggesting potential use for microwave signal switching.

Outcomes measured

  • microwave absorption spectrum
  • attenuation of electromagnetic waves
  • absorption coefficient
  • reflection coefficient

Limitations

  • No specific GHz frequency values reported in the abstract.
  • No quantitative effect sizes or measurement conditions provided in the abstract.
  • No sample size or number of materials/experiments described in the abstract.
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": "microwave",
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "microwave absorption spectrum",
    "attenuation of electromagnetic waves",
    "absorption coefficient",
    "reflection coefficient"
  ],
  "main_findings": "Spin-crossover complexes showed different microwave absorption/attenuation properties between high-spin and low-spin states during the thermal transition. Absorption and reflection coefficients were higher in the high-spin state than in the low-spin state, suggesting potential use for microwave signal switching.",
  "effect_direction": "mixed",
  "limitations": [
    "No specific GHz frequency values reported in the abstract.",
    "No quantitative effect sizes or measurement conditions provided in the abstract.",
    "No sample size or number of materials/experiments described in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "microwave",
    "GHz",
    "spin-crossover",
    "microwave absorption",
    "attenuation",
    "reflection coefficient",
    "wireless communication",
    "signal switching"
  ],
  "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: 10.1038/srep38334
PubMed: 27910956

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