Anisotropic order-disorder vortex transition in La2-x SrxCuO4

Y. Radzyner, A. Shaulov, Y. Yeshurun, I. Felner, K. Kishio, J. Shimoyama

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We report on magnetization measurements in (La0.937Sr0.063)2CuO4crystals with the field either parallel or perpendicular to the c axis. A second magnetization peak ("fishtail"), interpreted as indicating a vortex order-disorder transition, is observed in both directions. Differences in the details of the fishtail anomaly in the two directions (width, temperature and time dependence, and history effects) are attributed to the anisotropy and the twin boundaries in the ab plane. The transition fields in both directions, although different in magnitude, exhibit similar qualitative behavior, namely, a strong decrease with temperature in the entire measured range. This unique behavior is explained postulating that both thermally and disordered induced fluctuations contribute to the destruction of the vortex lattice. The resulting "pinned liquid" disordered state is characterized by large thermal fluctuations and irreversible magnetic behavior.

Original languageEnglish
Article number214525
Pages (from-to)2145251-2145257
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number21
DOIs
StatePublished - 1 Jun 2002

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