Effect on c-axis transport properties of a critical state in Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ single crystals

Author

Cho, J.H. ; Maley, M.P. ; Bulaevskii, L.N.

Author_Institution

Supercond. Technol. Center, Los Alamos Nat. Lab., NM, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1880

Lastpage

1883

Abstract

At low temperatures, the c-axis transport properties of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ single crystals depend strongly on the magnetic field history for fields applied along the c-axis, indicating the effect of a critical state in the ab direction. In this study, we report zero field cooled (ZFC), field cooled warming (FCW), and field cooled cooling (FCC) c-axis transport properties. In addition, we also report magnetic relaxation measurements on the same samples to identify the c-axis dissipation mechanism. We observe a relaxation of the c-axis resistivity that follows the relaxation of the flux profile across the ab plane. By identifying the irreversible temperature vs magnetic field for H/spl par/c, we construct a phase diagram of vortex states. Finally, we will discuss the implication of the phase diagram and the features related to the transport properties of the Josephson-coupled system and the role of pancake vortices in highly two-dimensional superconductors.<>

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); electrical resistivity; flux-line lattice; high-temperature superconductors; strontium compounds; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; Josephson-coupled system; c-axis dissipation; c-axis transport properties; critical currents; critical state; field cooled cooling properties; field cooled warming properties; high temperature superconductor; highly 2D superconductors; magnetic field history; magnetic relaxation; pancake vortices; resistivity; single crystals; vortex state phase diagram; zero field cooled properties; Bismuth; Cooling; Crystals; FCC; History; Magnetic field measurement; Magnetic flux; Magnetic properties; Strontium; Temperature dependence;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402948

Filename

402948