Irradiation effects on copper oxide superconductors including high-entropy REBCO(HE-REBCO)

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Materials and Energy Pub Date : 2024-07-19 DOI:10.1016/j.nme.2024.101709

Kota Sakurai , Aichi Yamashita , Yoshikazu Mizuguchi , Kiyohiro Yabuuchi , Naoko Oono-Hori

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Abstract

Polycrystalline specimens of copper oxide superconductors YBa₂Cu₃O_7-δ(YBCO), Y_0.39Sm_0.30Eu_0.31Ba₂Cu₃O_7-δ(ME-REBCO), Y_0.18La_0.24Nd_0.14Sm_0.14Eu_0.15Gd_0.15Ba₂Cu₃O_7-δ (HE-REBCO) were irradiated with 1 MeV-He ions at room temperature. Magnetization measurement using superconducting quantum interference device (SQUID) and microstructure observation using transmission electron microscope (TEM) were conducted before and after irradiation. The improvement of properties in HE-REBCO and degradations in YBCO, ME-REBCO were suggested by SQUID measurement. HE-REBCO had smaller irradiation defects and volume fractions although disappearance of twin boundaries due to tetragonal transition occurred in peak-damage area as well as YBCO. These defects work as optimal flux pinning centers leading to improve properties in HEREBCO.

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辐照对包括高熵 REBCO（HE-REBCO）在内的氧化铜超导体的影响

在室温下用 1 MeV-He 离子辐照了氧化铜超导体 YBa2Cu3O7-δ（YBCO）、Y0.39Sm0.30Eu0.31Ba2Cu3O7-δ（ME-REBCO）、Y0.18La0.24Nd0.14Sm0.14Eu0.15Gd0.15Ba2Cu3O7-δ（HE-REBCO）的多晶试样。在辐照前后使用超导量子干涉装置（SQUID）进行了磁化测量，并使用透射电子显微镜（TEM）观察了微观结构。SQUID 测量结果表明，HE-REBCO 的性能有所改善，而 YBCO 和 ME-REBCO 的性能有所下降。HE-REBCO 的辐照缺陷和体积分数较小，但在峰值损伤区和 YBCO 中，由于四方转变导致孪晶边界消失。这些缺陷可作为最佳磁通钉中心，从而改善 HEREBCO 的性能。

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.