Superconductivity in Anti-ThCr2Si2-type Er2O2Bi Induced by Incorporation of Excess Oxygen with CaO Oxidant

Kyohei Terakado; Ryosuke Sei; Hideyuki Kawasoko; Takashi Koretsune; Daichi Oka; Tetsuya Hasegawa; Tomoteru Fukumura

doi:10.1021/acs.inorgchem.8b01199

Superconductivity in Anti-ThCr₂Si₂-type Er₂O₂Bi Induced by Incorporation of Excess Oxygen with CaO Oxidant

Kyohei Terakado, Ryosuke Sei, Hideyuki Kawasoko, Takashi Koretsune, Daichi Oka, Tetsuya Hasegawa, Tomoteru Fukumura

Tohoku University

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

13 Citations (Scopus)

Abstract

Recently, superconductivity was induced by expanding interlayer distance between Bi square nets in anti-ThCr₂Si₂-type Y₂O₂Bi through incorporation of excess oxygen with increased nominal amount of oxygen. However, such oxygen incorporation was applicable to only Y₂O₂Bi among R₂O₂Bi (R = rare earth metal), probably due to a larger amount of oxygen incorporation for Y₂O₂Bi. In this study, the interlayer distance in Er₂O₂Bi was increased by cosintering with CaO, which served as an oxidant, indicating that excess oxygen was incorporated in Er₂O₂Bi. As a result, superconductivity was induced in Er₂O₂Bi at 2.2 K.

Original language	English
Pages (from-to)	10587-10590
Number of pages	4
Journal	Inorganic Chemistry
Volume	57
Issue number	17
DOIs	https://doi.org/10.1021/acs.inorgchem.8b01199
Publication status	Published - 2018 Sept 4

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title = "Superconductivity in Anti-ThCr2Si2-type Er2O2Bi Induced by Incorporation of Excess Oxygen with CaO Oxidant",

abstract = "Recently, superconductivity was induced by expanding interlayer distance between Bi square nets in anti-ThCr2Si2-type Y2O2Bi through incorporation of excess oxygen with increased nominal amount of oxygen. However, such oxygen incorporation was applicable to only Y2O2Bi among R2O2Bi (R = rare earth metal), probably due to a larger amount of oxygen incorporation for Y2O2Bi. In this study, the interlayer distance in Er2O2Bi was increased by cosintering with CaO, which served as an oxidant, indicating that excess oxygen was incorporated in Er2O2Bi. As a result, superconductivity was induced in Er2O2Bi at 2.2 K.",

author = "Kyohei Terakado and Ryosuke Sei and Hideyuki Kawasoko and Takashi Koretsune and Daichi Oka and Tetsuya Hasegawa and Tomoteru Fukumura",

note = "Funding Information: This study was in part supported by JSPS KAKENHI (26105002, 16H06441), JST-CREST, and Yazaki Memorial Foundation for Science and Technology. The authors acknowledge Dr. T. Miyazaki for SIMS measurements. Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

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doi = "10.1021/acs.inorgchem.8b01199",

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journal = "Inorganic Chemistry",

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T1 - Superconductivity in Anti-ThCr2Si2-type Er2O2Bi Induced by Incorporation of Excess Oxygen with CaO Oxidant

AU - Terakado, Kyohei

AU - Sei, Ryosuke

AU - Kawasoko, Hideyuki

AU - Koretsune, Takashi

AU - Oka, Daichi

AU - Hasegawa, Tetsuya

AU - Fukumura, Tomoteru

N1 - Funding Information: This study was in part supported by JSPS KAKENHI (26105002, 16H06441), JST-CREST, and Yazaki Memorial Foundation for Science and Technology. The authors acknowledge Dr. T. Miyazaki for SIMS measurements. Publisher Copyright: © 2018 American Chemical Society.

PY - 2018/9/4

Y1 - 2018/9/4

N2 - Recently, superconductivity was induced by expanding interlayer distance between Bi square nets in anti-ThCr2Si2-type Y2O2Bi through incorporation of excess oxygen with increased nominal amount of oxygen. However, such oxygen incorporation was applicable to only Y2O2Bi among R2O2Bi (R = rare earth metal), probably due to a larger amount of oxygen incorporation for Y2O2Bi. In this study, the interlayer distance in Er2O2Bi was increased by cosintering with CaO, which served as an oxidant, indicating that excess oxygen was incorporated in Er2O2Bi. As a result, superconductivity was induced in Er2O2Bi at 2.2 K.

AB - Recently, superconductivity was induced by expanding interlayer distance between Bi square nets in anti-ThCr2Si2-type Y2O2Bi through incorporation of excess oxygen with increased nominal amount of oxygen. However, such oxygen incorporation was applicable to only Y2O2Bi among R2O2Bi (R = rare earth metal), probably due to a larger amount of oxygen incorporation for Y2O2Bi. In this study, the interlayer distance in Er2O2Bi was increased by cosintering with CaO, which served as an oxidant, indicating that excess oxygen was incorporated in Er2O2Bi. As a result, superconductivity was induced in Er2O2Bi at 2.2 K.

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Superconductivity in Anti-ThCr₂Si₂-type Er₂O₂Bi Induced by Incorporation of Excess Oxygen with CaO Oxidant

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