Superconductivity over 30 K of Nd2CuO4 Films on CaF2 Substrates

Yoshiko Nanao; Michio Naito

doi:10.1007/s10948-019-05287-2

Superconductivity over 30 K of Nd₂CuO₄ Films on CaF₂ Substrates

Yoshiko Nanao^*, Michio Naito

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Nd₂CuO₄ has a crystal structure called the Nd₂CuO₄ (T’) structure in which fluorite-like Nd₂O₂ slabs and CuO₂ planes stack alternately. Nd₂CuO₄ is known to show superconductivity by carrier doping via anion/cation substitution, or making the oxygen sublattice highly ordered via a stringent control of thermodynamic conditions during crystal growth. In this study, CaF₂ is used for growing Nd₂CuO₄ films, as a substrate material which contains fluorine atoms. The films show superconducting onset (Tonc) beyond 30 K. Furthermore, in contrast to reported superconductivity in this system, the emergence of superconductivity is found to be insensitive to post annealing procedures.

Original language	English
Pages (from-to)	121-125
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	33
Issue number	1
DOIs	https://doi.org/10.1007/s10948-019-05287-2
Publication status	Published - 8 Jan 2020

Keywords

Cuprates
T' structure
Superconductivity

Access to Document

10.1007/s10948-019-05287-2

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Copyright © Springer Science+Business Media, LLC, part of Springer Nature 2020. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1007/s10948-019-05287-2
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Cite this

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title = "Superconductivity over 30 K of Nd2CuO4 Films on CaF2 Substrates",

abstract = "Nd2CuO4 has a crystal structure called the Nd2CuO4 (T{\textquoteright}) structure in which fluorite-like Nd2O2 slabs and CuO2 planes stack alternately. Nd2CuO4 is known to show superconductivity by carrier doping via anion/cation substitution, or making the oxygen sublattice highly ordered via a stringent control of thermodynamic conditions during crystal growth. In this study, CaF2 is used for growing Nd2CuO4 films, as a substrate material which contains fluorine atoms. The films show superconducting onset (Tonc) beyond 30 K. Furthermore, in contrast to reported superconductivity in this system, the emergence of superconductivity is found to be insensitive to post annealing procedures.",

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AB - Nd2CuO4 has a crystal structure called the Nd2CuO4 (T’) structure in which fluorite-like Nd2O2 slabs and CuO2 planes stack alternately. Nd2CuO4 is known to show superconductivity by carrier doping via anion/cation substitution, or making the oxygen sublattice highly ordered via a stringent control of thermodynamic conditions during crystal growth. In this study, CaF2 is used for growing Nd2CuO4 films, as a substrate material which contains fluorine atoms. The films show superconducting onset (Tonc) beyond 30 K. Furthermore, in contrast to reported superconductivity in this system, the emergence of superconductivity is found to be insensitive to post annealing procedures.

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