Homoepitaxial (110) YBa2Cu3O7-δ/YBa2Cu3O7-δ SNS junctions

被引：7

作者：

Usagawa, T ^{[1
]}

Wen, JG ^{[1
]}

Koyama, S ^{[1
]}

Utagawa, T ^{[1
]}

Tanabe, K ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Koto Ku, Tokyo 135, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1999年 / 38卷 / 4B期

关键词：

homoepitaxial SNS junctions; (110) YBCO homoepitaxy; Fe-doped YBCO; ultra smooth surface morphology;

D O I：

10.1143/JJAP.38.L436

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the first successful single crystal SNS junction based on (110) YBa2CU3O7-delta (YBCO)/YBa2(Cu1-xFex)(3)O7-delta, (YBCFeO: 150nm)NBa2Cu3O7-delta films grown on (110) YBCO single crystal substrates. The: surface flatness is nearly the same level as good as (110) YBCO homoepitaxial films, as confirmed by Scanning Electron Microscopy, Reflection High Energy Electron Diffraction and Transmission Electron Microscopy observations. The single crystal SNS junction shows an anisotropic field dependence in large-junction behavior at 77 K. The field supression of critical supercurrent I-c(T) is greater than 95% at 77 K and 9.0 K The temperature dependence of I-c(T) is well described by proximity SNS theory near the junction transition temperature T-cn but exibits nearly T-linear behavior at low temperature.

引用

页码：L436 / L439

页数：4

共 17 条

[1] PROXIMITY EFFECT IN YBA2CU3O7-DELTA/YBA2(CU1-XCOX)(3)O-7-DELTA-3/YBA2CU3O7-DELTA JUNCTIONS - FROM THE CLEAN LIMIT TO THE DIRTY LIMIT WITH PAIR-BREAKING [J].

ANTOGNAZZA, L ;

BERKOWITZ, SJ ;

GEBALLE, TH ;

CHAR, K .

PHYSICAL REVIEW B, 1995, 51 (13) :8560-8563

[2] STUDY OF INTERFACE RESISTANCES IN EPITAXIAL YBA2CU3O7-X/BARRIER/YBA2CU3O7-X JUNCTIONS [J].

CHAR, K ;

ANTOGNAZZA, L ;

GEBALLE, TH .

APPLIED PHYSICS LETTERS, 1993, 63 (17) :2420-2422

[3] COMPARATIVE-STUDY OF THE STATIONARY PROPERTIES OF HIGH-T-C PROXIMITY COUPLED JOSEPHSON-JUNCTIONS [J].

DELIN, KA ;

KLEINSASSER, AW .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1995, 5 (02) :2976-2979

[4] PROXIMITY EFFECTS WITH THE CUPRATES [J].

DEUTSCHER, G .

PHYSICA C, 1991, 185 :216-220

[5] Physics and technology of high temperature superconducting Josephson junctions [J].

Gross, R ;

Alff, L ;

Beck, A ;

Froehlich, OM ;

Koelle, D ;

Marx, A .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1997, 7 (02) :2929-2935

[6] JOSEPHSON CHARACTERISTICS IN A-AXIS ORIENTED YBA2CU3O7-DELTA/PRBA2CU3O7-DELTA'/YBA2CU3O7-DELTA JUNCTIONS [J].

HASHIMOTO, T ;

SAGOI, M ;

MIZUTANI, Y ;

YOSHIDA, J ;

MIZUSHIMA, K .

APPLIED PHYSICS LETTERS, 1992, 60 (14) :1756-1758

[7] CORRELATION OF CRITICAL-CURRENT AND RESISTANCE FLUCTUATIONS IN BICRYSTAL GRAIN-BOUNDARY JOSEPHSON-JUNCTIONS [J].

MARX, A ;

FATH, U ;

ALFF, L ;

GROSS, R .

APPLIED PHYSICS LETTERS, 1995, 67 (13) :1929-1931

[8] Crystallinity of YBa2Cu3O7-x single crystals grown by the pulling method [J].

Namikawa, Y ;

Egami, M ;

Koyama, S ;

Shiohara, Y ;

Kutami, H .

JOURNAL OF MATERIALS RESEARCH, 1996, 11 (04) :804-812

[9] C-AXIS OPTICAL-RESPONSE OF FULLY OXYGENATED YBA2CU3O7-DELTA - OBSERVATION OF DIRTY-LIMIT-LIKE SUPERCONDUCTIVITY AND RESIDUAL UNPAIRED CARRIERS [J].

SCHUTZMANN, J ;

TAJIMA, S ;

MIYAMOTO, S ;

TANAKA, S .

PHYSICAL REVIEW LETTERS, 1994, 73 (01) :174-177

[10] Superconductivity in (110) PrBa2Cu3O7-delta thin films pseudomorphically grown on (110) YBa2Cu3O7-delta single crystal substrates [J].

Usagawa, T ;

Ishimaru, Y ;

Wen, JG ;

Utagawa, T ;

Koyama, S ;

Enomoto, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1997, 36 (12A) :L1583-L1586

← 1 2 →