九州大学 研究者情報
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基本情報 研究活動 教育活動 社会活動
鈴木 匠(すずき たくみ) データ更新日:2019.06.24



主な研究テーマ
超音波を用いた高温超伝導線材の接合、及び接合抵抗率の評価
キーワード:REBCO、超伝導、接合
2019.04~2021.03.
先進高温超伝導線材の強磁場中の臨界電流特性の評価
キーワード:REBCO、超伝導、人工ピン
2016.04~2019.03.
リール式連続磁化計測装置を用いた長尺高温超伝導線材の特性評価
キーワード:超伝導 
2017.06~2019.03.
BaHfO3人工ピン導入EuBCO線材の低温高磁場特性の評価
キーワード:REBCO、超伝導、人工ピン
2015.04~2015.10.
商用Bi2223線材の磁場下の電流輸送特性の定式化
キーワード:超伝導、Bi2223、
2015.04~2016.03.
研究業績
主要原著論文
1. Satoshi Awaji, Takumi Suzuki, Hidetoshi Oguro, Kazuo Watanabe, Kaname Matsumoto, Strain-controlled critical temperature in REBa2Cu3Oy-coated conductors, scientific reports, 10.1038/srep11156, 5, 11156, 2015.06, Recently, we succeeded in detwinning REBa2Cu3O7 (RE123, RE = rare-earth elements)-coated
conductors by annealing under an external uniaxial strain. Using the untwinned RE123 tapes, the
uniaxial-strain dependencies of the critical temperature Tc along the a and b crystal axes were
investigated over a wide strain region from compression to tension. We found that the strain
dependencies of Tc for the a and b axes obey a power law but exhibit opposite slopes. In particular,
the maximum value of Tc is obtained when the CuO2 plane becomes a square, and its lattice constant
is close to 0.385 nm. It is suggested that a tetragonal structure with a ≈ 0.385 nm is the optimum
condition for a high critical temperature in high-Tc cuprates..
2. Takumi Suzuki, Satoshi Awaji, Hidetoshi Oguro, Kazuo Watanabe, Applied Strain Effect on Superconducting Properties for Detwinned (Y, Gd)BCO Coated Conductors, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 10.1109/TASC.2014.2377577, 25, 3, 2015.06, We succeeded in the complete detwin of (Y, Gd) BCO coated conductors using a newly developed in-situ tensile apparatus at high temperature. The intensities of (020) and (200) peaks in a longitudinal and a transverse directions of the tape measured by XRD were similar to each other for usual (Y, Gd) BCO coated conductors before annealing. However, the (200) peak disappears for the longitudinal direction after annealing under the tensile stress. It means that the coated conductors are detwinned by annealing under the tensile stress. We found that T-c linearly decreases with increasing strain for the B-domain (b-axis). This behavior is similar with a uniaxial-pressure effect in (Y, Gd) BCO single crystals. However, the strain dependence of T-c for the A-domain (a-axis) behaves as a power-law function, whereas the uniaxial-pressure dependency of T-c for the a-axis is reported to be linear. In addition, the strain dependencies of J(c) are similar with those of T-c.
3. Satoshi Awaji, Takumi Suzuki, Hidetoshi Oguro, Kazuo Watanabe, Shutaro Machiya, Michinaka Sugano, Masugu Sato, Tomoyuki Koganezawa, Kaname Matsumoto, Control of residual strain and twin boundary by annealing under strain, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 10.1088/0953-2048/26/6/065013, 26, 6, 2013.06, In REBa2Cu3Oy (RE123, RE = rare earth element) coated conductors, the coexistence of a- and b-axes domains related to a twin structure is one of the origins of the complicated critical current density property and its strain dependence. Hence, control of the twin structure is a very important issue. In the case of Y123 single crystals, detwinning is widely carried out by oxygen annealing under uniaxial stress along the a/b axis. In this study, commercial RE123 superconducting tapes were oxygen-annealed under external strains, similar to the detwinning process of Y123 single crystals. We found that the volume fraction ratio of the a- and b-axis domains changes with the applied external strains during annealing, indicating a change of twin structure. In addition, the residual strains, which are strains induced from the thermal contraction difference between RE123 and the substrate, increase with compression annealing and decrease with tension annealing for RE123 tapes with [100]/[010] orientation along the tape axis. However, those phenomena by strain annealing are not obtained for the [110] oriented RE123 tapes. The strain annealing method that we propose here is very useful to control the internal residual strain and twin structures in an RE123 tape with a [100]/[010] orientation along the tape axis..
4. Takumi Suzuki, Satoshi Awaji, Hidetoshi Oguro, Kazuo Watanabe, Michinaka Sugano, Shutaro Machiya, Masugu Sato, Teruo Izumi, Yuh Shiohara, Improvement of J(c) for GdBCO Coated Conductors by Annealing Under Strain, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 10.1109/TASC.2012.2229376, 23, 3, 2013.06.
主要学会発表等
1. Takumi Suzuki, Yuki Yamauchi, Shohei Noda, Kohei Higashikawa, Markus Bauer, Takanobu Kiss, In-field characterization of Ic distribution in a REBCO coated conductor made of co-evapolation
deposition on an ISD processed MgO template, The 3rd Asian Applied Physics Conference, 2018.12.
2. 鈴木 匠, 山内 勇輝, 野田 将平, 東川 甲平, Bauer Marku, 木須 隆暢, ISD法による長尺REBCO線材の磁場中局所臨界電流分布の評価, 2018年度秋季低温工学・超電導学会, 2018.11.
3. Takumi Suzuki, Taiki Mori, Syunsuke Omura, Shohei Noda, Yuki Yamauchi, Kohei Higashikawa, Masayoshi Inoue, Tatsunori Okada, Satoshi Awaji, Wataru Hirata, Shinji Fujita, Yasuhiro Iijima, Takanobu Kiss, Evaluations of local current transport characteristics of REBCO coated conductors by use of combination of reel-to-reel in-field magnetization measurement and site-specified four probe measurements up to 24 T of external magnetic fields, 2018 Applied Superconductivity Conference (ASC 2018), 2018.10.
4. 鈴木 匠, 野田 将平, 山内 勇輝, 東川 甲平, 平田 渉, 藤田 真司, 飯島 康裕, 木須 隆暢, 人工ピン導入長尺REBCO線材における磁場中局所臨界電流分布評価, 第79回応用物理学会秋季学術講演会, 2018.09.
5. 鈴木 匠, 森 泰輝, 大村 俊介, 野田 将平, 山内 勇輝, 東川 甲平, 井上 昌睦, 岡田 達典, 淡路 智, 柿本 一臣, 五十嵐 光則, 飯島 康裕, 木須 隆暢, 局所臨界電流分布を有する人工ピン導入長尺REBCO線材の局所電流輸送特性の評価, 2018年度春季低温工学・超電導学会, 2018.05.
6. 鈴⽊ 匠, 辻野 ⼤樹, 東川 甲平, 井上 昌睦, ⽊須 隆暢, 局所I c変化を有する⻑尺REBCO線材における局所電界分布, 第65回応用物理学会春季学術講演会, 2017.03.
7. Takanobu Kiss, Yuta Onodera, Shohei Noda, Kazutaka Imamura, Kohei Higashikawa, Takumi Suzuki, Masayoshi Inoue , Spatially Resolved Measurement on Local Electromagnetic Field Distribution in a Long Gd1Ba2Cu3O7-δ Coated Conductor during Magnetic Moment Relaxation by use of Hall Probe
Magnetometry
, The 2nd Asian Applied Physics Conference, 2017.12.
8. 鈴木 匠, 辻野 大樹, 大村 俊介, 東川 甲平, 井上 昌睦, PETRYKIN Valery, LEE Sergey, 木須 隆暢, 局所 J c分布を有するRBCO線材の電界-電流密度特性 , 2017年度秋季低温工学・超電導学会, 2017.11.
9. 鈴木 匠, 辻野 大樹 大村 俊介, 東川 甲平, 井上 昌睦, Petrykin Valery, Lee Sergey, 木須 隆暢, 局所Ic分布を有するRBCO線材の電界-電流密度特性 , 第78回応用物理学会秋季学術講演会, 2017.09.
10. Takanobu Kiss, Takumi Suzuki, Kohei Higashikawa, Takahiro Fukuzaki, Yuhei Nishimiya, Daiki Tsujino, Shohei Noda, Yuta Onodera, Masayoshi Inoue, Mitsunori Igarashi, Kazuomi Kakimoto, Yasuhiro Iijima, In-field Characterization of Local Ic and n-indices as a Function of Longitudinal Coordinate in a Long-length GdBCO Coated Conductor, International Conference on Magnet Technology 25 (MT25), 2017.08.
11. Takanobu Kiss, Kohei Higashikawa, Takumi Suzuki, Takahiro Fukuzaki, Daiki Tsujino, Yuta Onodera, Masayoshi Inoue, Description of temperature-, magnetic-field, and position-dependent current-voltage characteristics in high Tc superconducting long length coated conductors, CEC-ICMC 2017, 2017.07.
12. 鈴木 匠, 大村 俊介, 今村 和孝, 井上 昌睦, 東川 甲平, 淡路 智, 中岡 晃一, 和泉 輝郎, 木須 隆暢, 極薄膜積層TFA-MOD成膜によるBZO導入YGdBCO線材の磁場中臨界電流特性の向上, 2017年度春季低温工学・超電導学会, 2017.05.
13. 鈴木 匠, 福崎 貴裕, 辻野 大樹, 東川 甲平, 井上 昌睦, 木須 隆暢, 長尺REBCO線材の局所臨界電流分布を考慮した大域的電流密度‐電界特性のモデル化, 第64回応用物理学会春季学術講演会, 2017.03.
14. Takumi Suzuki, Takahiro Fukuzaki, Kohei Higashikawa, Masayoshi Inoue, Takanobu Kiss, Analysis of local Ic variation and I -V characteristics for long REBCO coated conductors, The 1st Asian Applied Physics Conference, 2016.12.
15. Takumi Suzuki, Takahiro Fukuzaki, Kohei Higashikawa, Masayoshi Inoue, Takanobu Kiss, Analytical expression of local I -V characteristics for long length REBCO coated conductors under the local Ic fluctuation, 1st Asian ICMC and CSSJ 50th Anniversary Conference, 2016.11.
16. 鈴木 匠, 呂 琳, 大村 俊介, 井上 昌睦, 東川 甲平, 木須 隆暢, 商用Bi2223線材における臨界電流特性と局所臨界電流密度の統計分布, 第77回応用物理学会秋季学術講演会, 2016.09.
17. Takumi Suzuki, Lin Lyu, Syunsuke Omura, Ken Takasaki, Masayoshi Inoue, Kohei Higashikawa, Takanobu Kiss, Analytical expression of in-field current transport properties in a commercially available Bi-2223 high Tc superconducting wire, 2016 Applied Superconductivity Conference (ASC 2016), 2016.09.
18. 鈴木 匠, 高崎 建, 井上 昌睦, 小野寺 優太, 今村 和孝, 東川 甲平, 衣斐 顕, 吉田 朋, 和泉 輝郎, 土屋 雄二, 淡路 智, 渡辺 和雄, 木須 隆暢, BHO導入EuBCO線材の広範な温度、磁場における臨界電流特性, 2016年度春季低温工学・超電導学会, 2016.06.
19. 鈴木 匠, 小野寺 優太, 井上 昌睦, 東川 甲平, 衣斐 顕, 吉田 朋, 町 敬人, 和泉 輝郎, 木須 隆暢, 引き抜き法によるBaHfO3導入EuBCO線材の低温高磁場特性の評価, 第63回応用物理学会春季学術講演会, 2016.03.
20. 鈴木 匠, 小野寺 優太, 井上 昌睦, 東川 甲平, 木須 隆暢, 衣斐 顕, 吉田 朋, 町 敬人, 和泉 輝郎, BaHfO3人工ピン導入EuBCO線材の低温高磁場特性の評価, 2015年度秋季低温工学・超電導学会, 2015.12.
21. 鈴木 匠, 高崎 建, 呂 琳, 大村 俊介, 井上 昌睦, 東川 甲平, 木須 隆暢, 商用Bi2223線材の磁場下の電流輸送特性の定式化, 2015年度秋季低温工学・超電導学会, 2015.12.
学会活動
所属学会名
応用物理学会
低温工学・超電導学会
学会大会・会議・シンポジウム等における役割
2018.03.14~2018.03.16, 平成30年 電気学会全国大会, 現地実行委員.
学術論文等の審査
年度 外国語雑誌査読論文数 日本語雑誌査読論文数 国際会議録査読論文数 国内会議録査読論文数 合計
2017年度      
受賞
2017年度国際交流若手賞, 低温工学・超伝導学会, 2017.11.
エネルギーウィーク・ポスターセッション 優秀賞, 九州大学, 2017.02.
平成27年度 優良発表賞, 低温工学・超電導学会, 2015.05.

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