n-value and second derivative of the superconductor voltage-current characteristic

Author

Goodrich, L.F. ; Srivastava, A.N. ; Yuyama, M. ; Wada, H.

Author_Institution

Nat. Inst. of Stand. & Technol., Boulder, CO, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1265

Lastpage

1268

Abstract

The authors studied the n-value (V varies as I/sup n/) and second derivative (d/sup 2/V/dI/sup 2/) of the voltage-current curve of high- and low-temperature superconductors and superconductor simulators. They used these parameters for diagnosing problems with sample heating and data acquisition, and as indicators of the superconducting-to-normal state transition. The superconductor simulator may be useful in testing the measurement system integrity and reducing measurement variability since its characteristics are highly repeatable.<>

Keywords

high-temperature superconductors; superconducting transition temperature; type II superconductors; high temperature superconductors; low-temperature superconductors; n-value; sample heating; second derivative; superconductor-normal transition; voltage-current characteristic; Critical current; Data acquisition; Electrical resistance measurement; Heating; High temperature superconductors; NIST; Smoothing methods; Superconducting device noise; Superconducting filters; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233394

Filename

233394