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Pinning lattice: Effect of rhenium doping on the microstructural evolution from -2212 to films during cation exchange
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic diagrams of the lattice structure of film when of unit cells (textured symbols) are replaced with ones (solid): (a) a plan view, and (b) a cross-sectional view.

Image of FIG. 2.
FIG. 2.

XRD spectra of (a) a film fabricated using cation exchange process; and (b) a film made under the same condition as (a). The XRD spectra of their precursor films are also shown, respectively, in (c) and (d). Both precursor films were about thick. After cation exchange, the film thickness reduced to when the 2212 unit cells were transferred to 1212 cells . All films were on substrates.

Image of FIG. 3.
FIG. 3.

SEM micrographs of (a) a superconducting precursor film; and (b) a precursor of film both annealed in Thallium vapor at for in an crucible in flowing oxygen gas.

Image of FIG. 4.
FIG. 4.

SEM micrographs of (a) film, and (b) film both made using cation-exchange process in vapor at for .

Image of FIG. 5.
FIG. 5.

Magnetic susceptibility as a function of temperature measured in zero-field-cool mode on , films, and their precursor films. The magnetic field was applied along the normal of the film.

Image of FIG. 6.
FIG. 6.

Temperature dependence of of the film (circle solid symbol) and the film (square solid symbol) plotted (a) in the original scale and (b) normalized scale . The inset of (b) replots the data in (b) on the normalized temperature scale .

Image of FIG. 7.
FIG. 7.

(a) curves at different temperatures of , , and for and films. (b) replots the same ’s at and on the normalized scale is the at zero applied magnetic field.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pinning lattice: Effect of rhenium doping on the microstructural evolution from Tl-2212 to Hg-1212 films during cation exchange