Hysteretic flux dynamics in a detwinned YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// crystal from SQUID picovoltmeter measurements

Author

Gordeev, S.N. ; Volkozub, A.V. ; de Groot, P.A.J. ; Gagnon, R. ; Taillefer, L. ; Khanin, V.V. ; Matlashov, A.N. ; Polyakov, Yu.A. ; Slobodchikov, V.Yu.

Author_Institution

Dept. of Phys., Southampton Univ., UK

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1158

Lastpage

1160

Abstract

We report measurements of resistivity hysteresis in both temperature and magnetic field performed on a detwinned YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// single crystal in the region of the vortex lattice melting transition. We have found evidence that the observed hysteresis cannot be explained by current-induced nonequilibrium effects. The measured voltage-current characteristics for the sample in the overheated state also display hysteretic behaviour. This strongly supports the idea that the vortex solid can be melted by transport current.

Keywords

barium compounds; electrical resistivity; flux-line lattice; high-temperature superconductors; hysteresis; magnetoresistance; yttrium compounds; HTSC; SQUID picovoltmeter measurements; YBa/sub 2/Cu/sub 3/O/sub 7/; current-induced nonequilibrium effects; detwinned YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// crystal; hysteretic flux dynamics; overheated state; resistivity hysteresis; voltage-current characteristics; vortex lattice melting transition; vortex solid; Conductivity; Electrical resistance measurement; Lattices; Magnetic field measurement; Magnetic hysteresis; Performance evaluation; Physics; SQUIDs; Temperature dependence; Thermodynamics;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620697

Filename

620697