In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 35, No. 2B ( 1996-02-01), p. L209-
Abstract:
Large single-crystalline superconducting grains of Tl 2 Ba 2 Ca 2 Cu 3 O 10+ x (Tl-2223) with sizes up to 150 µm×150 µm×1 µm are obtained on both MgO(100) and LaAlO 3 (100) substrates by a single-target dc-sputtering process followed by appropriate postannealing at temperatures around 910°C. Such superconducting grains were isolated and patterned into 10-µm-wide bridges by reactive ion etching. The etching process was found to only minimally affect the transition temperature, T c , typically around 110 K, of the films. Although there was evidence that these films were indeed two-dimensional in nature, the critical current densities, J c , were greater than 10 6 A/cm 2 at temperatures below 90 K. At lower temperatures, e.g. , T =30 K, the J c value of these films remains well above 10 6 A/cm 2 even with magnetic fields as large as 7 T applied parallel to the c -axis of the grains. The results are in sharp contrast to the low J c values expected from the low-dimensionality nature of this system.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.35.L209
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1996
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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