The influence of substitution of terbium on the superconducting behaviour of YBa2Cu3O7−δ

Gunasekaran, R.A.; Yakhmi, J. V.; Iyer, R.M.

doi:10.1007/bf00274481

Cited by 9 publications

(1 citation statement)

References 18 publications

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“…Further increases in the kinetic inductance of YBCO films without creating oxygen vacancies are possible by the substitution of yttrium (Y) with another rare-earth metal [19,20]. Among the different rare-earth metals, terbium (Tb) is known for its ability to increase the in-plane resistivity of YBCO by more than one order of magnitude without reductions in the critical temperature, for a Tb content up to 50% [21][22][23][24]. Since kinetic inductance is proportional to resistivity, the high resistivity might be a sign of the high kinetic inductance of Tb-substituted YBCO films.…”

Section: Introductionmentioning

confidence: 99%

In-Plane Anisotropy of Electrical Transport in Y0.85Tb0.15Ba2Cu3O7−x Films

Lyatti,

Kraiem,

Röper

et al. 2024

Materials

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We fabricated high-quality c-axis-oriented epitaxial YBa2Cu3O7−x films with 15% of the yttrium atoms replaced by terbium (YTBCO) and studied their electrical properties. The Tb substitution reduced the charge carrier density, resulting in increased resistivity and decreased critical current density compared to pure YBa2Cu3O7−x films. The electrical properties of the YTBCO films showed an in-plane anisotropy in both the superconducting and normal states that, together with the XRD data, provided evidence for, at least, a partially twin-free film. Unexpectedly, the resistive transition of the bridges also demonstrated the in-plane anisotropy that could be explained within the framework of Tinkham’s model of resistive transition and the Berezinskii–Kosterlitz–Thouless (BKT) model, depending on the sample parameters. Measurements of the differential resistance in the temperature range of the resistive transition confirmed the occurrence of the BKT transition in the YTBCO bridges. Therefore, we consider the YTBCO films to be a promising platform for both the fabrication of devices with high kinetic inductance and fundamental research on the BKT transition in cuprate superconductors.

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Section: Introductionmentioning

confidence: 99%

In-Plane Anisotropy of Electrical Transport in Y0.85Tb0.15Ba2Cu3O7−x Films

Lyatti,

Kraiem,

Röper

et al. 2024

Materials

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Critical and Gaussian Conductivity Fluctuations in Granular Ho1−x Pr x Ba2Cu3O7−δ Superconductor

Sousa

Pinheiro

Jurelo

et al. 2010

J Supercond Nov Magn

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Fluctuation-Induced Conductivity of Polycrystalline (Ho–Ce)Ba 2 Cu 3 O $_{7-\boldsymbol\delta}$ Superconductor

et al. 2011

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We report on systematic conductivity fluctuation measurements on samples of Ho 1−x Ce x Ba 2 Cu 3 O 7−δ with x = 0.00, 0.05, and 0.10. The samples were produced by a standard solid-state reaction method, and the microstructure was analyzed by X-ray diffraction. To identify power-law divergences of the conductivity, the results were analyzed in terms of the temperature derivative of the resistivity dρ/dT and with the logarithmic derivative of the conductivity with respect to temperature −d ln( σ )/dT. It was observed that the critical temperature decreases and that the transition width increases with increasing Ce doping. The data showed the occurrence of a two-stage transition besides the pairing transition splitting, associated with Ce doping and related with the occurrence of a phase separation. Above the critical temperature, the Gaussian and critical regimes were observed. On approaching the zero resistance state, our results showed a power-law behavior that corresponds to a phase transition from a paracoherent to a coherent state of the granular array.

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The influence of substitution of terbium on the superconducting behaviour of YBa2Cu3O7−δ

Cited by 9 publications

References 18 publications

In-Plane Anisotropy of Electrical Transport in Y0.85Tb0.15Ba2Cu3O7−x Films

In-Plane Anisotropy of Electrical Transport in Y0.85Tb0.15Ba2Cu3O7−x Films

Critical and Gaussian Conductivity Fluctuations in Granular Ho1−x Pr x Ba2Cu3O7−δ Superconductor

Fluctuation-Induced Conductivity of Polycrystalline (Ho–Ce)Ba 2 Cu 3 O $_{7-\boldsymbol\delta}$ Superconductor

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