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APS » Journals » Phys. Rev. Lett. » Volume 71 » Issue 23
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Phys. Rev. Lett. 71, 3862–3865 (1993)

Evidence for flux-lattice melting and a dimensional crossover in single-crystal Bi2.15Sr1.85CaCu2O8+δ from muon spin rotation studies

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S. L. Lee, P. Zimmermann, H. Keller, M. Warden, I. M. Savić, R. Schauwecker, D. Zech, R. Cubitt, E. M. Forgan, P. H. Kes, T. W. Li, A. A. Menovsky, and Z. Tarnawski
Physik-Institut der Universität Zürich, CH-8057 Zürich, Switzerland
School of Physics and Space Research, University of Birmingham, Birmingham B15 2TT, United Kingdom
Kamerlingh Onnes Laboratorium, Leiden University, P.O. Box 9506, 2300 RA Leiden, The Netherlands
Department of Physics, University of Amsterdam, 1018 XE Amsterdam, The Netherlands

Received 16 July 1993; published in the issue dated 6 December 1993

The microscopic magnetic field distribution in the mixed state of single-crystal Bi2.15Sr1.85CaCu2O8+δ has been measured using the muon spin rotation technique. A study of the line shapes as a function of temperature and magnetic field gives evidence for an abrupt change of flux-lattice structure which is attributed to the presence of a flux-lattice melting line in the B-T phase diagram. In addition, the data suggest the existence of a crossover field above which the flux structure is more 2D in nature.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.71.3862
DOI:
10.1103/PhysRevLett.71.3862
PACS:
74.60.Ge, 74.25.Dw, 74.72.Hs, 76.75.+i
 
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