Y2O3添加seed層を用いたIBAD-MgO基板上でのBHO-doped SmBCO薄膜の微細構造観察および磁束ピンニング特性

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2017/05/01

タイトル(英語): Microstructures and Flux Pinning Properties of BHO-doped SmBa2Cu3Oy Thin Films on IBAD-MgO Substrates with Y2O3-doped Seed Layer

著者名: 渡邉　優太郎（名古屋大学大学院工学研究科エネルギー理工学専攻），吉田　隆（名古屋大学大学院工学研究科エネルギー理工学専攻），一野　祐亮（名古屋大学大学院工学研究科エネルギー理工学専攻），衣斐　顕（（国）産業技術総合研究所エネルギー・環境領域省エネルギー研究部門），和泉　輝郎（（国）産業技術総合研究所エネルギー・環境領域省エネルギー研究部門），加藤　丈晴（（一財）ファインセラミックスセンター）

著者名(英語): Yutaro Watanabe (Dept. of Energy Engineering and Science, Nagoya University), Yutaka Yoshida (Dept. of Energy Engineering and Science, Nagoya University), Yusuke Ichino (Dept. of Energy Engineering and Science, Nagoya University), Akira Ibi (National Institute of Advanced Industrial Science and Technology), Teruo Izumi (National Institute of Advanced Industrial Science and Technology), Takeharu Kato (Japan Fine Ceramics Center)

キーワード: SmBa2Cu3Oy，BaHfO3，ナノロッド，Y2O3，IBAD-MgO　　SmBa2Cu3Oy，BaHfO3，nanorod，Y2O3，IBAD-MgO

要約(英語): We have reported that a low temperature growth (LTG) technique is effective to expand the lower growth temperature region of c-axis orientated SmBa2Cu3Oy (SmBCO) thin films so far. However, BaHfO3 (BHO)-doped SmBCO LTG-films show serious decrease of Jc at low magnetic field compared with conventional PLD-films. We investigated thickness dependence of SmBCO seed layers on LSAT single crystal. The result shows the seed layer is the cause of Jc decrease at low magnetic field due to flux line motion in the seed layer. In order to prevent the Jc decrease, we have tried to add Y2O3 in the seed layer on IBAD-MgO substrate. As a result, Sm-rich particles were formed in the seed layer, and those particles prevented flux line motion in the seed layer. After that, we measured the BHO-doped SmBCO films on Y2O3-doped seed layer at 77 K. As a result, the Y2O3-doped seed layer is effective at 77 K because the diameter of Sm-rich particle is about 17 nm which is larger than coherent length of 77 K in REBCO films. In summary, we improved Jc decrease at low magnetic field by adding the Y2O3 in the seed layer, and that film deposited by PLD-LTG technique showed high Jc at wide magnetic field.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.5 （2017） 特集：革新的な光応用技術

本誌掲載ページ: 298-303 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/5/137_298/_article/-char/ja/