JOSEPHSON EFFECTS IN YBA2CU3O7-X GRAIN-BOUNDARY JUNCTIONS ON (001) NDGAO3 BICRYSTAL SUBSTRATES

被引：14

作者：

ANDREEV, AV ^{[1
]}

DIVIN, YY ^{[1
]}

GUBANKOV, VN ^{[1
]}

KOTELYANSKII, IM ^{[1
]}

KRAVCHENKO, VB ^{[1
]}

ZYBTSEV, SG ^{[1
]}

STEPANTSOV, EA ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST CRYSTALLOG,MOSCOW 117333,RUSSIA

来源：

PHYSICA C | 1994年 / 226卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90472-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Grain-boundary YBa2Cu3O7-x Josephson junctions were fabricated on (001) NdGaO3 bicrystal substrates with a misorientation angle of 2 x 18.4-degrees. Both DC and AC Josephson effects were studied in these high-T(c) junctions in the range from liquid-helium up to liquid-nitrogen temperatures. The values of characteristic voltages were up to 0.34 mV at a temperature of 10 K. The I-V curves of the junctions and their response to low-intensity millimeter-wave radiation were shown to be described by the RSJ model with thermal fluctuations. Values of responsivity up to 10(6) V/W and a noise equivalent power as low as 10(-14)W/Hz1/2 were obtained for these junctions operating both in wideband and selective detection modes at a frequency of 78 GHz. The applicability of YBa2Cu3O7-x Josephson junctions made on NdGaO3 bicrystal substrates for detection and spectral analysis of millimeter-wave and far-infrared radiation is emphasized.

引用

页码：17 / 22

页数：6

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