Anomalous magnetic behaviour in non-resonant microwave absorption study of Bi-2212 superconductors

Author

Tripathy, Malay Ranjan ; Srivastava, G.P.

Author_Institution

Dept. of Electron. Sci., Delhi Univ., India

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

4079

Lastpage

4081

Abstract

The non-resonant microwave absorption (NRMA) studies in silver doped polycrystalline Bi₂Sr₂Ca₁Cu₂O₈ samples have been carried out. The NRMA signal has been observed not only below Tc but also above Tc which is much above the fluctuation regime when the DC magnetic field was swept from -50 G to +50 G through 0G. Anomalous magnetic hysteresis behaviour has been observed where the forward curve lies above the return curve even at lower temperatures. The observed curve has been simulated by taking into consideration the sum of reversible losses as well as irreversible losses using Dulcic and Portis models. This leads to anomalous magnetic hysteresis behaviour as has been observed experimentally

Keywords

bismuth compounds; calcium compounds; electromagnetic wave absorption; fluctuations in superconductors; high-temperature superconductors; magnetic hysteresis; silver; strontium compounds; Ag doped polycrystalline Bi₂Sr₂Ca₁Cu₂O₈ samples; Bi-2212 superconductors; Bi₂Sr₂Ca₁Cu₂O₈; BiSrCaCuO:Ag; DC magnetic field; Dulcic model; HTSC; Portis model; anomalous magnetic behaviour; fluctuation regime; irreversible losses; magnetic hysteresis behaviour; nonresonant microwave absorption; reversible losses; Electromagnetic wave absorption; High temperature superconductors; Magnetic fields; Magnetic hysteresis; Magnetic materials; Silver; Superconducting magnets; Superconducting materials; Superconducting microwave devices; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800761

Filename

800761