Title :
Measurement of AC losses in textured polycrystalline Bi-2212 thin rods
Author :
Martinez, E. ; Hughes, T.J. ; Yang, Y. ; Beduz, C. ; Angurel, L.A.
Author_Institution :
Inst. of Cryogenics, Southampton Univ., UK
fDate :
6/1/1999 12:00:00 AM
Abstract :
AC losses of textured polycrystalline Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+x/ thin rods carrying AC transport currents have been measured in self-field and in DC magnetic fields at 77 K. Measurements of the first and third harmonic of the voltage are presented. The current amplitude and frequency dependence of losses as well as the ratio between the different harmonics of the voltage is analysed. The results are compared with the losses calculated numerically for a superconductor characterised by power-law current-voltage dependence.
Keywords :
bismuth compounds; calcium compounds; harmonics; high-temperature superconductors; loss measurement; strontium compounds; voltage measurement; 77 K; AC losses measurement; AC transport currents; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; DC magnetic fields; current amplitude; first voltage harmonic measurement; high temperature superconductor; losses frequency dependence; power-law current-voltage dependence; self-field; textured polycrystalline Bi-2212 thin rods; textured polycrystalline Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+x/ thin rods; third voltage harmonic measurement; voltage harmonics ratio; Annealing; Contacts; Current measurement; Electrical resistance measurement; Frequency dependence; Harmonic analysis; Loss measurement; Magnetic field measurement; Silver; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
