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Author Bernhard, C. ♦ Niedermayer, C. ♦ Binninger, U. ♦ Hofer, A. ♦ Wenger, C. ♦ Tallon, J. L. ♦ Williams, G. V. M. ♦ Ansaldo, E. J. ♦ Budnick, J. I. ♦ Stronach, C. E. ♦ Noakes, D. R. ♦ Blankson-Mills, M. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ MUON SPIN RELAXATION ♦ COPPER OXIDES ♦ BARIUM OXIDES ♦ YTTRIUM OXIDES ♦ PENETRATION DEPTH ♦ POLYCRYSTALS ♦ TRANSITION TEMPERATURE ♦ MAGNETIC FIELDS
Abstract We summarize our results of transverse-field muon-spin-relaxation (TF-{mu}SR) experiments on a variety of polycrystalline cuprate high-{ital T}{sub {ital c}} superconducting systems. In this paper we present the conditions under which the {mu}SR depolarization rate at low temperatures {sigma}{sub 0}{proportional_to}{lambda}{sub {ital a}{ital b}}{sup {minus}2}(0){proportional_to}{ital n}{sub {ital s}}(0)/{ital m}{sub {ital a}{ital b}}{sup *} is determined in a unique way by the doping state of CuO{sub 2} planes and the consequent critical temperature {ital T}{sub {ital c}}. Disorder and pinning effects due to various sorts and amounts of dopant atoms do not affect {sigma}{sub 0}. From our results on YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, YBa{sub 2}Cu{sub 4}O{sub 8}, and Y{sub 2}Ba{sub 4}Cu{sub 7}O{sub 15{minus}{delta}} (systems having both planes and chains) we conclude that a superconducting condensate is not only formed in the CuO{sub 2} planes but is induced additionally in the CuO chains. This chain condensate is rapidly suppressed by any disorder in the chains and depends strongly on the oxygen ordering.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-10-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 52
Issue Number 14


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