NONBOLOMETRIC LASER-INDUCED VOLTAGE SIGNALS IN YBA2CU3O7-DELTA THIN-FILMS AT ROOM-TEMPERATURE

被引:26
|
作者
KLEINHAMMES, A
CHANG, CL
MOULTON, WG
TESTARDI, LR
机构
[1] Department of Physics, Florida State University, Tallahassee
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 05期
关键词
D O I
10.1103/PhysRevB.44.2313
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report on detailed studies of laser-induced voltage signals observed in unbiased YBa2Cu3O7-delta thin films at room temperature. The induced signals are measured as a function of incident energy, bias current, light polarization, and wavelength. The observed signals are remarkable because of their magnitude, up to 2 V across 4-OMEGA at 30 mJ/cm2, and because they represent potentials which are forbidden by the known crystal symmetry of YBa2CU3O7-delta if two obvious explanations, pyroelectricity and off-diagonal thermoelectricity, are considered. The signal proves to be independent of the polarization of light as well as its wavelength for lambda = 1064, 532, and 355 nm. Our measurements provide strong evidence that the observed signals do not have a bolometric origin. The signal amplitude is proportional to the magnitude of the incident energy and not its energy density. The time constant of the bolometric response, determined by applying a bias current, is different from that of the transient. The dependence of the time constant, tau-s of tbe transient on the film thickness is not unique. For films with thicknesses below 4000 angstrom, tau-s, agrees with simulated thermal diffusion times. Thicker films appear to show time constants independent of thickness, in contrast with predictions for thermal diffusion. Although the reflectivity is a symmetric function of the angle of incidence about the normal, the voltage signals are not.
引用
收藏
页码:2313 / 2319
页数:7
相关论文
共 50 条
  • [21] NOX SENSOR USING YBA2CU3O7-DELTA THIN-FILMS
    KUDO, S
    OHNISHI, H
    MATSUMOTO, T
    IPPOMMATSU, M
    SENSORS AND ACTUATORS B-CHEMICAL, 1995, 23 (2-3) : 219 - 222
  • [22] OXYGEN POTENTIAL CONTROL IN YBA2CU3O7-DELTA THIN-FILMS
    NAKAMURA, K
    YE, JH
    ISHII, A
    PHYSICA C, 1993, 213 (1-2): : 1 - 13
  • [23] REACTION PATTERNING OF YBA2CU3O7-DELTA THIN-FILMS ON SI
    FORK, DK
    BARRERA, A
    GEBALLE, TH
    VIANO, AM
    FENNER, DB
    APPLIED PHYSICS LETTERS, 1990, 57 (23) : 2504 - 2506
  • [24] ION-BEAM-INDUCED DAMAGE IN THIN-FILMS OF YBA2CU3O7-DELTA
    WHITE, AE
    SHORT, KT
    DYNES, RC
    VALLES, JM
    LEVI, AFJ
    ANZLOWAR, M
    BALDWIN, KW
    JOURNAL OF METALS, 1988, 40 (11): : 115 - 116
  • [25] SUPERCONDUCTING YBA2CU3O7-DELTA THIN-FILMS WITH 3 DIFFERENT ORIENTATIONS
    WANG, XK
    LI, DX
    LI, DQ
    LU, YP
    SONG, SN
    SHEN, YH
    ZHENG, JQ
    CHANG, RPH
    KETTERSON, JB
    CHABALA, JM
    HANSLEY, D
    LEVISETTI, R
    JOURNAL OF APPLIED PHYSICS, 1990, 67 (09) : 4217 - 4220
  • [26] Reversible laser annealing on YBa2Cu3O7-delta thin films
    Eisenmenger, J
    Steinke, R
    Brand, C
    Kambach, S
    Hoffmann, M
    Bechinger, C
    Leiderer, P
    LASER PHYSICS, 1997, 7 (02) : 349 - 355
  • [27] PHOTOVOLTAIC SIGNALS IN YBA2CU3O7-DELTA FILMS DUE TO LASER-INDUCED MAGNETIC-FLUX REDISTRIBUTION
    ROBL, K
    SCHLAFFER, G
    OPREA, C
    BRUNNER, B
    KUS, O
    PRETTL, W
    RENK, KF
    LENGFELLNER, H
    PHYSICA C, 1995, 249 (3-4): : 333 - 338
  • [28] LASER WAVELENGTH DEPENDENT PROPERTIES OF YBA2CU3O7-DELTA THIN-FILMS DEPOSITED BY LASER ABLATION
    KOREN, G
    GUPTA, A
    BASEMAN, RJ
    LUTWYCHE, MI
    LAIBOWITZ, RB
    APPLIED PHYSICS LETTERS, 1989, 55 (23) : 2450 - 2452
  • [29] THE ORIGINS OF GROWTH SPIRALS ON LASER-ABLATED YBA2CU3O7-DELTA THIN-FILMS
    AINDOW, M
    YEADON, M
    PHILOSOPHICAL MAGAZINE LETTERS, 1994, 70 (01) : 47 - 53
  • [30] STUDIES OF EXCIMER LASER ANNEALING OF INSITU DEPOSITED THIN-FILMS OF YBA2CU3O7-DELTA
    ESTLER, RC
    NOGAR, NS
    MUENCHAUSEN, RE
    DYE, RC
    FLAMME, C
    MARTIN, JA
    GARCIA, AR
    FOLTYN, S
    MATERIALS LETTERS, 1990, 9 (09) : 342 - 346