Investigation of the vortex order-disorder phase transition line in Bi 2Sr2CaCu2O8+x using ac techniques

I. Sochnikov, A. Shaulov, Y. Yeshurun

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2 Scopus citations

Abstract

ac magnetic measurements were employed in the study of the vortex phase diagram in Bi2 Sr2 Ca Cu2 O8+x. The Bragg-glass to vortex-glass (solid-solid) and the Bragg-glass to liquid (melting) transitions are manifested in these measurements by an increase or a decrease in the screening signal, respectively. The ac measured solid-solid transition line extends to high temperatures where a melting transition is observed in dc measurements. Increasing the frequency of the ac field can further enlarge this region of the solid-solid transition. These results confirm that the solid-solid and the solid-liquid transition lines are two segments of the same order-disorder phase transition line.

Original languageEnglish
Article number07C705
JournalJournal of Applied Physics
Volume103
Issue number7
DOIs
StatePublished - 2008

Bibliographical note

Funding Information:
This research is supported in part by the Israel Science Foundation (ISF) and by the Heinrich Hertz Minerva Center for High-Temperature Superconductivity.

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