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(RE)Ba2Cu3O7- and the Roeser-Huber Formula.

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Materials (Basel, Switzerland)
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Summary
This summary is machine-generated.

The Roeser-Huber formula accurately calculates the superconducting transition temperature (Tc) for rare-earth barium copper oxide (REBCO) materials. This method also predicts the impact of strain and pressure on Tc in thin films.

Keywords:
Roeser–Huber formulacupratesflux pinningoxygen distributionrare earthssuperconductorstransition temperature Tc

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Superconductivity

Background:

  • High-temperature superconductors, specifically rare-earth barium copper oxide (REBCO) materials, exhibit complex superconducting properties.
  • Previous work established the Roeser-Huber formula for calculating Tc in YBa2Cu3O7-δ, but challenges remained for samples with higher oxygen doping levels (δ=0.45).
  • Understanding the influence of crystallographic data and oxygen arrangements is crucial for accurate Tc prediction.

Purpose of the Study:

  • To apply and validate the Roeser-Huber formula for calculating the superconducting transition temperature (Tc) across various REBCO compounds.
  • To investigate the effects of strain and pressure on Tc in REBCO thin films.
  • To elucidate the role of characteristic length (x) in flux pinning and the peak effect within REBCO systems.

Main Methods:

  • Utilizing the Roeser-Huber formula, incorporating electronic configuration and crystallographic data of REBCO materials.
  • Analyzing literature data on crystallographic properties of various REBCO compounds.
  • Calculating Tc for different REBCO systems and simulating the effects of strain and pressure on thin film samples.

Main Results:

  • The Roeser-Huber formula successfully calculates Tc for a range of REBCO compounds, addressing previous limitations with oxygen doping.
  • The study demonstrates the formula's capability to predict the influence of strain and pressure on Tc in REBCO thin films.
  • A characteristic length (x) was determined for REBCO systems, correlating with pinning site size and flux pinning phenomena.

Conclusions:

  • The Roeser-Huber formula provides a robust method for predicting Tc in REBCO materials, considering crystallographic and electronic factors.
  • Strain and pressure significantly influence Tc in REBCO thin films, as predicted by the formula.
  • The characteristic length (x) offers insights into flux pinning mechanisms and the peak effect in REBCO superconductors.