REPRODUCIBILITY OF TRANSITION-TEMPERATURE AND CRITICAL CURRENT-DENSITY OF THIN-FILMS OF YBA2CU3O7 ON (100)LAALO3

被引：4

作者：

MOGROCAMPERO, A

TURNER, LG

机构：

[1] GE Research and Development Center, Schenectady, 12301, New York

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1991年 / 4卷 / 01期

关键词：

SUPERCONDUCTING FILMS; YBA2CU3O7; CRITICAL CURRENT; LAALO3;

D O I：

10.1007/BF00618299

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Submicrometer epitaxial films of YBa2Cu3O7 (YBCO) on (100) LaAlO3 were made by coevaporation and furnace annealing. Samples from more than a dozen runs are used in this study. The zero resistance transition temperature (T(c)) is high (89 or 90 K) if the film composition is phase pure (Ba/Y = 2, Cu/Y = 3) or if it is enriched in Ba and Cu. For these compositions the critical current density (J(c)) at 77 K has an average value of 2 x 10(5) A cm-2, with a tendency for decreasing J(c) with increasing film thickness (0.2 to 0.8-mu-m). Variations in J(c) are not correlated with deviations from ideal stoichiometry. Steeper slopes of the resistance-temperature curves above 100 K and lower values of the room-temperature resistivity are associated with high values of J(c). If the film composition is enriched in Y relative to Ba and Cu, T(c) decreases by several degrees.

引用

页码：61 / 65

页数：5

共 10 条

[1]

Simon R.W., Platt C.E., Lee A.E., Lee G.S., Daly K.P., Wire M.S., Luine J.A., Urbanik M., Appl. Phys. Lett., 53, (1988)

[2]

Mogro-Campero A., Turner L.G., Hall E.L., Garbauskas M.F., Lewis N., Appl. Phys. Lett., 54, (1989)

[3]

Jung G., Dabrowski A., Gierlowski P., Kula W., Physica C, 158, (1989)

[4]

Feenstra R., Budai J.D., Galloway M.D., Boatner L.A., Comparison between LaGaO3, LaAlO3, KTaO3, and SrTiO3 substrates for the epitaxial growth of YBa2Cu3O7-x thin films by a “BaF2 process”, Physica C: Superconductivity, 162-164, (1989)

[5]

Nuss M.C., Mankiewich P.M., Howard R.E., Straughn B.L., Harvey T.E., Brandle C.D., Berkstresser G.W., Goosen K.W., Smith P.R., Appl. Phys. Lett., 54, (1989)

[6]

Inam A., Wu X.D., Nazar L., Hegde M.S., Rogers C.T., Venkatesan T., Simon R.W., Daly K., Padaee H., Kirchgessner J., Moffat D., Rubin D., Shu Q.S., Kalokitis D., Fathy A., Pendrick V., Brown R., Brycki B., Belohoubek E., Drabeck L., Gruner G., Hammond R., Gamble F., Lairson B.M., Bravman J.C., Appl. Phys. Lett., 56, (1990)

[7]

Mogro-Campero A., Turner L.G., Kendall G., Appl. Phys. Lett., 53, (1988)

[8]

Mogro-Campero A., Turner L.G., Hall E.L., Lewis N., Peluso L.A., Balz W.E., Supercond. Sci. Technol., 3, (1990)

[9]

Enomoto Y., Murakami T., Suzuki M., Moriwaki K., Physica B, 148, (1988)

[10]

Cooke D.W., Gray E.R., Arendt P.N., Elliot N.E., Rollet A.D., Schofield T.G., Mogro-Campero A., Turner L.G., J. Appl. Phys., 68, (1990)

← 1 →