Effect of substrate’s nature on the growth of HgBCCO thin films

Barros, D. De; Ortéga, L.; Peroz, C.; Weiss, F.; Odier, P.

doi:10.1016/j.physc.2006.03.064

Cited by 4 publications

(5 citation statements)

References 30 publications

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“…The XRD analysis suggests that strained CeO 2 films are more efficient for the Hg-1223 phase growth than relaxed ones. The formation of the Hg-1223 proceeds in steps after the initial formation of Hg-1212 which is transformed by intercalation of Ca-Cu-O [8,16,17]. In this reaction, the dislocation network…”

Section: Resultsmentioning

confidence: 99%

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Influence of the buffer layer on the growth of superconducting films based on mercury

Valeriánová

Odier

Chromík

et al. 2007

Supercond. Sci. Technol.

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Thin films of mercury based superconductors were prepared on R-plane sapphire with a CeO2 buffer layer by a two-step process involving the deposition of the Hg-free precursor and ex situ mercuration in a sealed quartz tube. We used CeO2 buffer layers of different thicknesses to study their influence on the phase composition and properties of the final films. We succeeded in preparing a Hg-1223 superconducting phase on thin CeO2 buffered (10 nm) R-plane sapphire with a critical temperature TC0 up to 122.5 K and critical current density JC up to 4 × 105 A cm−2.

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Section: Resultsmentioning

confidence: 99%

“…De Barros et al [8] studied the influence of the substrate on the growth of HgBCCO films. They used LAO (001) and MgO (001) substrates with lattice mismatches 1.4% and −8.7%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Influence of the buffer layer on the growth of superconducting films based on mercury

Valeriánová

Odier

Chromík

et al. 2007

Supercond. Sci. Technol.

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“…However, we believe this approach will be more challenging due to issues that arise when growing Hg-Ba-Ca-Cu-O thin films. [37] Finally, we note that more systematic integration of existence data sources, deposition of new data and novel data mining efforts [38] are desirable to improve superconductivity databases. Consolidating the vast amount of information available in the literature into a comprehensive source, containing critical temperatures alongside atomic structures, would facilitate the improved application of materials informatics approaches.…”

Section: Discussionmentioning

confidence: 99%

“…However, we believe this approach will be more challenging due to issues that arise when growing Hg‐Ba‐Ca‐Cu‐O thin films. [ 37 ]…”

Section: Discussionmentioning

confidence: 99%

Materials Informatics Reveals Unexplored Structure Space in Cuprate Superconductors

Goodall

Zhu

MacManus‐Driscoll

et al. 2021

Adv Funct Materials

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High-temperature superconducting cuprates have the potential to be transformative in a wide range of energy applications. In this work, the corpus of historical data about cuprates is analyzed using materials informatics, re-examining how their structures are related to their critical temperatures (Tc). The available data is highly clustered and no single database contains all the features of interest to properly examine trends. To work around these issues a linear calibration approach that allows the utilization of multiple data sources is employed, combining fine resolution data for which the Tc is unknown with coarse resolution data where it is known. The hybrid data set constructed enables the exploration of the trends in Tc with the apical and in-plane copper-oxygen distances. It is shown that large regions of the materials space have yet to be explored. Novel experiments relying on the nano-engineering of the crystal structure may enable the exploration of such new regions. Based on the trends identified it is proposed that single layer Bibased cuprates are good candidate systems for such experiments.

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“…To the best of our knowledge, this is the first time epitaxy of the Hg-1223 thin films has been demonstrated. Despite many efforts to grow Hg-1223 films with or without doping, only polycrystalline and c-axis orientation have been reported so far[26][27][28].The SEM images of sample B before and after the Tl-Hg cation exchange are shown in figures 5(a) and (b), respectively. The surface microstructure becomes slightly less dense after the cation exchange treatment.…”

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confidence: 99%

Superconductivity of 132 K in HgBa₂Ca₂Cu₃O_8+δthin films fabricated using a cation exchange method

Yan

2013

Supercond. Sci. Technol.

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A cation exchange method was applied to convert epitaxial TlBa 2 Ca 2 Cu 3 O 8 (Tl-1223) and Tl 2 Ba 2 Ca 2 Cu 3 O 10 (Tl-2223) precursor superconducting thin films to epitaxial HgBa 2 Ca 2 Cu 3 O 8+δ (Hg-1223) films on LaAlO 3 (001) substrates. While the conversion of Tl-1223 to Hg-1223 was partially successful, high-quality epitaxial Hg-1223 films were obtained from Tl-2223 precursor films. A critical transition temperature T c of up to 132 K has been demonstrated for the Hg-1223 films, which is close to the optimal value of 135 K reported on Hg-1223 bulk samples. The critical current density J c of the Hg-1223 films was up to 0.25 MA cm −2 at 77 K and self-field. This work represents the first success in achieving the highest-T c epitaxial Hg-1223 films using the cation exchange method, which are promising candidates for device applications with operational temperatures significantly above the temperature of liquid nitrogen.

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Effect of substrate’s nature on the growth of HgBCCO thin films

Cited by 4 publications

References 30 publications

Influence of the buffer layer on the growth of superconducting films based on mercury

Influence of the buffer layer on the growth of superconducting films based on mercury

Materials Informatics Reveals Unexplored Structure Space in Cuprate Superconductors

Superconductivity of 132 K in HgBa₂Ca₂Cu₃O_8+δthin films fabricated using a cation exchange method

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Effect of substrate’s nature on the growth of HgBCCO thin films

Cited by 4 publications

References 30 publications

Influence of the buffer layer on the growth of superconducting films based on mercury

Influence of the buffer layer on the growth of superconducting films based on mercury

Materials Informatics Reveals Unexplored Structure Space in Cuprate Superconductors

Superconductivity of 132 K in HgBa2Ca2Cu3O8+δthin films fabricated using a cation exchange method

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Product

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Superconductivity of 132 K in HgBa₂Ca₂Cu₃O_8+δthin films fabricated using a cation exchange method