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Cross section TEM images of (a) IBAD-1 and (b) IBAD-2. Vertical striations in the bottom part of both images correspond to different grains in the IBAD-YSZ layer (grain size ). Different contrast in the YBCO layer in (a) is due to grain-to-grain tilts, indicating a lateral grain size of . Image (b) shows two large YBCO grains stacked along the axis, separated by an intercalated Ba–Cu–O layer (see Ref. 5). The grains extend beyond the vertical edges of the image. MO images for (c) IBAD-1 and (d) IBAD-2 after zero-field cooling the samples at and applying 4.
Saturated reverse branches of M(H) for (엯) IBAD-1, (●) IBAD-2, (◻) RABiTS-1, and (∎) RABiTS-2. , is indicated by arrows. Inset shows minor M(H) of RABiTS-2 at , 600, 800, 1000, 2000, and . , and are indicated.
Theoretical factor as a function of the cylinder aspect ration (continuous line) (defined in Ref. 12) Superimposed are the experimental values for (엯) IBAD-1, (●) IBAD-2, (◻) RABiTS-1, and (∎) RABiTS-2. Inset shows the average grain sizes as a function of the average substrate grain size. The solid line indicates substrate grain size equal to YBCO grain size.
(closed symbols) and (open symbols) as a function of the thickness of the YBCO layer, at , for several RABiTS with replica of the GB network including RABiTS-1 (squares), RABiTS with GB overgrowth; including RABiTS-2 (diamonds), and for IBAD-1 (triangles), and IBAD-2 (circles). Also included are values of the transport for RABiTS samples with replica of YBCO GB network (stars).
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