X-ray irradiation effects on the superconductive properties of YBa2Cu3Oy and GdBa2Cu3Oz

Takuya Kabutoya; Masanori Koshimizu; Yutaka Fujimoto; Keisuke Asai

doi:10.18494/SAM.2017.1627

X-ray irradiation effects on the superconductive properties of YBa₂Cu₃O_y and GdBa₂Cu₃O_z

Takuya Kabutoya, Masanori Koshimizu, Yutaka Fujimoto, Keisuke Asai

ENG - Applied Chemistry

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

1 Citation (Scopus)

Abstract

We observed a metastable change in the superconducting properties of YBa₂Cu₃O_y (YBCO) and GdBa₂Cu₃O_z (GdBCO) induced by X-ray irradiation. T_c0, which is defined as the temperature below which the electric resistance is zero within the measurement accuracy, was increased by up to 1.9 K in YBCO and GdBCO. The irradiation effect was more pronounced for the YBCO sample with lower T_c0. These observations are consistent with those of light irradiation, and are attributable to hole doping in the CuO₂ plane via the generation of electron-hole pairs by the X-ray and subsequent trapping of the electrons at oxygen vacancies. The relaxation of the irradiation effect was observed to be within 100 h from the viewpoint of conductivity and Raman spectra, and is explained as the detrapping of the electrons and recombination with holes, similarly to the case of light irradiation.

Original language	English
Pages (from-to)	1465-1470
Number of pages	6
Journal	Sensors and Materials
Volume	29
Issue number	10
DOIs	https://doi.org/10.18494/SAM.2017.1627
Publication status	Published - 2017

Keywords

Photo-doping
Superconductor
X-ray irradiation

ASJC Scopus subject areas

Instrumentation
Materials Science(all)

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@article{aaa73b750cbd486ba9073ea039165407,

title = "X-ray irradiation effects on the superconductive properties of YBa2Cu3Oy and GdBa2Cu3Oz",

abstract = "We observed a metastable change in the superconducting properties of YBa2Cu3Oy (YBCO) and GdBa2Cu3Oz (GdBCO) induced by X-ray irradiation. Tc0, which is defined as the temperature below which the electric resistance is zero within the measurement accuracy, was increased by up to 1.9 K in YBCO and GdBCO. The irradiation effect was more pronounced for the YBCO sample with lower Tc0. These observations are consistent with those of light irradiation, and are attributable to hole doping in the CuO2 plane via the generation of electron-hole pairs by the X-ray and subsequent trapping of the electrons at oxygen vacancies. The relaxation of the irradiation effect was observed to be within 100 h from the viewpoint of conductivity and Raman spectra, and is explained as the detrapping of the electrons and recombination with holes, similarly to the case of light irradiation.",

keywords = "Photo-doping, Superconductor, X-ray irradiation",

author = "Takuya Kabutoya and Masanori Koshimizu and Yutaka Fujimoto and Keisuke Asai",

note = "Funding Information: This work was partially supported by a Grant-in-Aid for Scientific Research (B) (No. 15H04238, 2015–2017). This work was partially supported by the Cooperative Research Project of the Research Institute of Electronics, Shizuoka University.",

year = "2017",

doi = "10.18494/SAM.2017.1627",

language = "English",

volume = "29",

pages = "1465--1470",

journal = "Sensors and Materials",

issn = "0914-4935",

publisher = "M Y U Scientific Publishing Division",

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TY - JOUR

T1 - X-ray irradiation effects on the superconductive properties of YBa2Cu3Oy and GdBa2Cu3Oz

AU - Kabutoya, Takuya

AU - Koshimizu, Masanori

AU - Fujimoto, Yutaka

AU - Asai, Keisuke

N1 - Funding Information: This work was partially supported by a Grant-in-Aid for Scientific Research (B) (No. 15H04238, 2015–2017). This work was partially supported by the Cooperative Research Project of the Research Institute of Electronics, Shizuoka University.

PY - 2017

Y1 - 2017

N2 - We observed a metastable change in the superconducting properties of YBa2Cu3Oy (YBCO) and GdBa2Cu3Oz (GdBCO) induced by X-ray irradiation. Tc0, which is defined as the temperature below which the electric resistance is zero within the measurement accuracy, was increased by up to 1.9 K in YBCO and GdBCO. The irradiation effect was more pronounced for the YBCO sample with lower Tc0. These observations are consistent with those of light irradiation, and are attributable to hole doping in the CuO2 plane via the generation of electron-hole pairs by the X-ray and subsequent trapping of the electrons at oxygen vacancies. The relaxation of the irradiation effect was observed to be within 100 h from the viewpoint of conductivity and Raman spectra, and is explained as the detrapping of the electrons and recombination with holes, similarly to the case of light irradiation.

AB - We observed a metastable change in the superconducting properties of YBa2Cu3Oy (YBCO) and GdBa2Cu3Oz (GdBCO) induced by X-ray irradiation. Tc0, which is defined as the temperature below which the electric resistance is zero within the measurement accuracy, was increased by up to 1.9 K in YBCO and GdBCO. The irradiation effect was more pronounced for the YBCO sample with lower Tc0. These observations are consistent with those of light irradiation, and are attributable to hole doping in the CuO2 plane via the generation of electron-hole pairs by the X-ray and subsequent trapping of the electrons at oxygen vacancies. The relaxation of the irradiation effect was observed to be within 100 h from the viewpoint of conductivity and Raman spectra, and is explained as the detrapping of the electrons and recombination with holes, similarly to the case of light irradiation.

KW - Photo-doping

KW - Superconductor

KW - X-ray irradiation

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