Surface currents and bulk pinning in Bi2Sr2CaCu2O8

D. Majer, E. Zeldov, M. Konczykowski, V. B. Geshkenbein, A. I. Larkin, L. Burlachkov, V. M. Vinokur, N. Chikumoto

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The mechanisms giving rise to the irreversibility line (IL) in the phase diagram of Bi2Sr2CaCu2O8 and the mechanism behind the second maximum in the magnetization loops were determined using a novel Hall-sensor array. The IL is caused by bulk pinning at lower temperatures and by irreversible shielding currents above 22K. The second maximum is caused by vortex lattice melting, taking place at the same local magnetic induction Bm throughout the sample.

Original languageEnglish
Pages (from-to)2765-2766
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 4
StatePublished - Dec 1994

Bibliographical note

Funding Information:
ponentiatle mperaturdee pendencweh ich is con-sistentw ith thermala ctivationo f the vortices over a Bean-Livingstosnu rfaceb arrier\ [4\]A. t T > 60K Hp(T)a ndH xs(T)fo llowa lineart em-peratured ependenceS.u chb ehavioirs consistent with the presencoef geometricbala rriers\[ 1,3\A].t lowert emperaturethse o bservedu pturno f Hp(T) and HtL(T)i s the resulto f a significanbt ulk pinning. This work was supportedb y the Israeli Ministry of Sciencea nd the Arts, by the Philip M. Klutznick Fund, by MINERVA foundationa, nd by France-Israeclo operatiopnr ogramP ICS 112. VMV acknowledgeths es upportt hroughU S De-partmenotf Energy,B ES-MaterialSs ciencesu, n-der contracNt o. W-31-109-ENG-38.


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