DISTRIBUTION OF FLUX-PINNING ENERGIES IN YBA2CU3O7-DELTA AND BI2SR2CACU2O8+DELTA FROM FLUX NOISE

被引：121

作者：

FERRARI, MJ

JOHNSON, M

WELLSTOOD, FC

CLARKE, J

MITZI, D

ROSENTHAL, PA

EOM, CB

GEBALLE, TH

KAPITULNIK, A

BEASLEY, MR

机构：

[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720

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

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.64.72

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spectral density of the magnetic flux noise measured in high-temperature superconductors in low magnetic fields scales approximately as the inverse of the frequency and increases with temperature. We use the temperature and frequency dependence of the noise to determine the pinning energies of individual flux vortices in thermal equilibrium. The distribution of pinning energies peaks below 0.1 eV in YBa2Cu3O7- and near 0.2 eV in Bi2Sr2CaCu2O8. The noise power is proportional to the ambient magnetic field, indicating that the vortex motion is uncorrelated. © 1990 The American Physical Society.

引用

页码：72 / 75

页数：4

共 19 条

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