Y-Ba-Cu-O系超伝導体と電気光学結晶との反応性(<小特集>セラミック材料小特集号)

概要

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We investigated the reactivity of Yba_2Cu_3O_y (YBCO) with electrooptic crystals, such as LiNbO_3 (LN), LiTaO_3 (LT), Sr_<0.75>Ba_<0.25>Nb_2O_6 (SBN), KTa_<0.65>Nb_<0.35>O_3 (KTN), Ba_2NaNb_5O_<15> (BNN). The YBCO powder mixed with 5 wt% electrooptic crystal was heated at 700℃ for 8 hr, l6 hr or at 900℃ for 8 hr in air. The reactivity of LT, LN, KTN with YBCO was considerably high, and that of BNN was relativlylow. The YBCO thin films were deposited on LN and BNN substrates through an RF magnetron sputtering m.ethod. The YBCO thin films on BNN were c-axes Oriented with T_c (zero)=72.5K and c=11.70 Å. The thickness of the reaction layer for BNN was one order of magnitude thinner than that for LN. From these results, the BNN single crystal was concluded to be suitable for an electrooptic substrate for YBCO thin film fabrication.
社団法人日本材料学会の論文
1992-05-15