IMAGING OF ELECTRICAL INHOMOGENEITIES IN YBA2CU3O7-X THIN-FILM STRUCTURES BY ROOM-TEMPERATURE LASER-SCANNING MICROSCOPY

被引：13

作者：

DIVIN, YY

SHADRIN, PM

机构：

[1] Institute of Radioengineering and Electronics, Russian Academy of Sciences, Moscow, 103907

来源：

PHYSICA C | 1994年 / 232卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90784-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Imaging of local electrical inhomogeneities in YBa2Cu3O7-x thin films and grain-boundary junctions was demonstrated at room temperature. The spatial distributions of the voltage response of the samples to the focused laser beam were measured with and without bias current through the samples. High-contrast electrical images consisting of 512 x 512 points with 8 bit signal resolution and a spatial resolution of up to 1 mum were obtained for all YBa2Cu3O7-x samples under study. The zero-bias response was shown to reveal the grain-boundary regions in the samples and might be explained by thermoelectric effects. The response proportional to the current bias was shown to be due to the bolometric effect in the material itself and this response can be used to study the inhomogeneities in grain composition.

引用

页码：257 / 262

页数：6

共 9 条

[1]

AFANASEV AS, 1989, JETP LETT+, V49, P776

[2] INPLANE THERMOELECTRIC-POWER OF UNTWINNED YBA2CU3O7-DELTA [J].

COHN, JL ;

SKELTON, EF ;

WOLF, SA ;

LIU, JZ .

PHYSICAL REVIEW B, 1992, 45 (22) :13140-13143

[3] ANISOTROPIC THERMOELECTRIC-POWER AND CONDUCTIVITY IN SINGLE-CRYSTAL YBA2CU3OY [J].

CROMMIE, MF ;

ZETTL, A ;

BARBEE, TW ;

COHEN, ML .

PHYSICAL REVIEW B, 1988, 37 (16) :9734-9737

[4] LASER PROBING OF HIGH-TC SUPERCONDUCTING THIN-FILMS [J].

DIVIN, YY ;

NAD, FY ;

POKROVSKI, VY ;

SHADRIN, PM .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (02) :1101-1104

[5] JOSEPHSON OSCILLATIONS AND NOISE TEMPERATURES IN YBA2CU3O7-X GRAIN-BOUNDARY JUNCTIONS [J].

DIVIN, YY ;

MYGIND, J ;

PEDERSEN, NF ;

CHAUDHARI, P .

APPLIED PHYSICS LETTERS, 1992, 61 (25) :3053-3055

[6] MILLIMETER-WAVE RESPONSE AND LINEWIDTH OF JOSEPHSON OSCILLATIONS IN YBA2CU3O7 STEP-EDGE JUNCTIONS [J].

DIVIN, YY ;

ANDREEV, AV ;

FISCHER, GM ;

MYGIND, J ;

PEDERSEN, NF ;

HERRMANN, K ;

GLYANTSEV, VN ;

SIEGEL, M ;

BRAGINSKI, AI .

APPLIED PHYSICS LETTERS, 1993, 62 (11) :1295-1297

[7] LOW-TEMPERATURE SCANNING ELECTRON-MICROSCOPY STUDIES OF SUPERCONDUCTING THIN-FILMS AND JOSEPHSON-JUNCTIONS [J].

GROSS, R ;

DODERER, T ;

HUEBENER, RP ;

KOBER, F ;

KOELLE, D ;

KRUELLE, C ;

MANNHART, J ;

MAYER, B ;

QUENTER, D ;

USTINOV, A .

PHYSICA B, 1991, 169 (1-4) :415-421

[8] THE MICROSTRUCTURE OF EPITAXIAL YBA2CU3O7 FILMS ON STEEP STEPS IN LAALO3 SUBSTRATES [J].

JIA, CL ;

KABIUS, B ;

URBAN, K ;

HERRMANN, K ;

SCHUBERT, J ;

ZANDER, W ;

BRAGINSKI, AI .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1992, 196 (3-4) :211-226

[9] GIANT VOLTAGES UPON SURFACE HEATING IN NORMAL YBA2CU3O7-DELTA FILMS SUGGESTING AN ATOMIC LAYER THERMOPILE [J].

LENGFELLNER, H ;

KREMB, G ;

SCHNELLBOGL, A ;

BETZ, J ;

RENK, KF ;

PRETTL, W .

APPLIED PHYSICS LETTERS, 1992, 60 (04) :501-503

← 1 →