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14 Mar 1988

Volume 52, Issue 11, pp. 857-934

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rf properties of an oxide‐superconductor half‐wave resonant line

J. R. Delayen, K. C. Goretta, R. B. Poeppel, and K. W. Shepard

Appl. Phys. Lett. 52, 930 (1988); http://dx.doi.org/10.1063/1.99277 (3 pages) | Cited 25 times

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Cylindrical rods of YBa2Cu3O7−δ from 0.6 to 1.9 mm in diameter and up to 565 mm long have been used as the center conductor of a half‐wave resonant coaxial line. The resonant line can be immersed in liquid nitrogen, which provides excellent cooling of the current‐carrying superconducting surface, even in the presence of substantial rf losses. Such superconducting resonant lines have been operated at frequencies of a few hundred MHz and at rf surface magnetic fields up to 150 G at 77 K.
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85.25.Qc Superconducting surface acoustic wave devices and other superconducting devices
74.70.-b Superconducting materials other than cuprates
74.25.N- Response to electromagnetic fields

Crystallography of phase transition of YBa2Cu3O7−δ

Vinayak P. Dravid, C. E. Lyman, and M. R. Notis

Appl. Phys. Lett. 52, 933 (1988); http://dx.doi.org/10.1063/1.99225 (2 pages) | Cited 3 times

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A space‐group theoretical approach has been applied to the high Tc superconducting oxide YBa2Cu3O7−δ (δ∼0.3) to explain the occurrence of coherent domain boundaries. This method quantitatively accounts for the transmission electron microscopy (TEM) observations of {110} twin boundaries in the room‐temperature orthorhombic phase. The possible nature of the relaxation of these twin boundaries and the atomic arrangement at these boundaries are briefly discussed.
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61.72.Mm Grain and twin boundaries
68.35.Rh Phase transitions and critical phenomena
74.70.-b Superconducting materials other than cuprates
64.70.K- Solid-solid transitions
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