RANDOM TELEGRAPH SIGNALS IN HIGH-TEMPERATURE SUPERCONDUCTORS

被引：20

作者：

JOHNSON, M

FERRARI, MJ

WELLSTOOD, FC

CLARKE, J

BEASLEY, MR

INAM, A

WU, XD

NAZAR, L

VENKATESAN, T

机构：

[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT & CHEM SCI,BERKELEY,CA 94720

[2] STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305

[3] RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855

[4] BELL COMMUN RES INC,RED BANK,NJ 07701

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.42.10792

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The local magnetization of YBa2Cu3O7-x and Bi2Sr2CaCu2O8+y measured with a superconducting quantum-interference device is shown to exhibit random telegraph signals (RTSs) over narrow ranges of temperature. We believe these signals arise from the thermally activated hopping of single magnetic vortices between two pinning sites. The spectral density of the RTS is Lorentzian; from the temperature dependence of the characteristic time, we deduce pinning energies of 0.17 and 0.20 eV for samples of YBa2Cu3O7-x and Bi2Sr2CaCu2O8+y, respectively, at reduced temperatures of 0.99 and 0.87. The amplitudes of various RTSs imply flux hopping distances varying from 0.2 to 30 m. Multiple metastable states and transitions between noisy and quiet states are also observed. © 1990 The American Physical Society.

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页码：10792 / 10795

页数：4

相关论文

共 24 条

[1] VORTEX STRUCTURE IN YBA2CU3O7 AND EVIDENCE FOR INTRINSIC PINNING [J].

DOLAN, GJ ;

CHANDRASHEKHAR, GV ;

DINGER, TR ;

FEILD, C ;

HOLTZBERG, F .

PHYSICAL REVIEW LETTERS, 1989, 62 (07) :827-830

[2] INSITU GROWN YBA2CU3O7-D THIN-FILMS FROM SINGLE-TARGET MAGNETRON SPUTTERING [J].

EOM, CB ;

SUN, JZ ;

YAMAMOTO, K ;

MARSHALL, AF ;

LUTHER, KE ;

GEBALLE, TH ;

LADERMAN, SS .

APPLIED PHYSICS LETTERS, 1989, 55 (06) :595-597

[3] LOW MAGNETIC-FLUX NOISE OBSERVED IN LASER-DEPOSITED INSITU FILMS OF YB2CU3OY AND IMPLICATIONS FOR HIGH-TC SQUIDS [J].

FERRARI, MJ ;

JOHNSON, M ;

WELLSTOOD, FC ;

CLARKE, J ;

INAM, A ;

WU, XD ;

NAZAR, L ;

VENKATESAN, T .

NATURE, 1989, 341 (6244) :723-725

[4] DISTRIBUTION OF FLUX-PINNING ENERGIES IN YBA2CU3O7-DELTA AND BI2SR2CACU2O8+DELTA FROM FLUX NOISE [J].

FERRARI, MJ ;

JOHNSON, M ;

WELLSTOOD, FC ;

CLARKE, J ;

MITZI, D ;

ROSENTHAL, PA ;

EOM, CB ;

GEBALLE, TH ;

KAPITULNIK, A ;

BEASLEY, MR .

PHYSICAL REVIEW LETTERS, 1990, 64 (01) :72-75

[5] MAGNETIC-FLUX NOISE IN THIN-FILM RINGS OF YBA2CU3O7-DELTA [J].

FERRARI, MJ ;

JOHNSON, M ;

WELLSTOOD, FC ;

CLARKE, J ;

ROSENTHAL, PA ;

HAMMOND, RH ;

BEASLEY, MR .

APPLIED PHYSICS LETTERS, 1988, 53 (08) :695-697

[6]

GALLAGHER WJ, 1989, ADV SUPERCONDUCTIVIT

[7] EVIDENCE FROM MECHANICAL MEASUREMENTS FOR FLUX-LATTICE MELTING IN SINGLE-CRYSTAL YBA2CU3O7 AND BI2.2SR2CA0.8CU2O8 [J].

GAMMEL, PL ;

SCHNEEMEYER, LF ;

WASZCZAK, JV ;

BISHOP, DJ .

PHYSICAL REVIEW LETTERS, 1988, 61 (14) :1666-1669

[8] OBSERVATION OF HEXAGONALLY CORRELATED FLUX QUANTA IN YBA2CU3O7 [J].

GAMMEL, PL ;

BISHOP, DJ ;

DOLAN, GJ ;

KWO, JR ;

MURRAY, CA ;

SCHNEEMEYER, LF ;

WASZCZAK, JV .

PHYSICAL REVIEW LETTERS, 1987, 59 (22) :2592-2595

[9] THE DEVELOPMENT OF SQUID MAGNETOMETERS USING BULK CERAMIC SUPERCONDUCTORS [J].

GOUGH, CE ;

COLCLOUGH, MS ;

HARROP, SP ;

KEENE, MN ;

MUIRHEAD, CM .

JOURNAL OF THE LESS-COMMON METALS, 1989, 151 (1-2) :461-471

[10] EVIDENCE FOR A VORTEX-GLASS STATE FROM MECHANICAL MEASUREMENTS OF FLUX-LINE-INDUCED ENERGY-DISSIPATION IN YBA2CU3O7-X THIN-FILMS [J].

GREGORY, S ;

ROGERS, CT ;

VENKATESAN, T ;

WU, XD ;

INAM, A ;

DUTTA, B .

PHYSICAL REVIEW LETTERS, 1989, 62 (13) :1548-1551