Critical field measurements in superconductors using ac inductive techniques

S. A. Campbell*, John B Ketterson, G. W. Crabtree

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The ac in-phase and out-of-phase response of type II superconductors is discussed in terms of dc magnetization curves. Hysteresis in the dc magnetization is shown to lead to a dependence of the ac response on the rate at which an external field is swept. This effect allows both Hc1 and Hc2 to be measured by ac techniques. A relatively simple mutual inductance bridge for making such measurements is described in the text, and factors affecting bridge sensitivity are discussed in the Appendix. Data for the magnetic superconductor ErRh4B4 obtained using this bridge are reported.

Original languageEnglish (US)
Pages (from-to)1191-1198
Number of pages8
JournalReview of Scientific Instruments
Issue number9
StatePublished - Dec 1 1983

ASJC Scopus subject areas

  • Instrumentation


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