Muon-spin-rotation measurements of the London penetration depths in YBa sub 2 Cu sub 3 O sub 6. 97

Journal Article · Thu Nov 01 00:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.8019· OSTI ID:6193751

Puempin, B; Keller, H; Kuendig, W; Odermatt, W; Savic, I M; Schneider, J W; Simmler, H; Zimmermann, P ^[1]; Kaldis, E; Rusiecki, S ^[2]; Maeno, Y; Rossel, C ^[3]

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1. Physik-Institut der Universitaet Zuerich, CH-8001 Zuerich (Switzerland)
2. Laboratorium fuer Festkoerperphysik, Eidgenoessische Technische Hochschule Zuerich, CH-8093 Zuerich (Switzerland)
3. IBM Research Division, Zuerich Research Laboratory, CH-8803 Rueschlikon (Switzerland)

Muon-spin-rotation ({mu}SR) experiments on a high-quality sintered YBa{sub 2}Cu{sub 3}O{sub {ital x}} sample ({ital x}=6.970(1)) were performed, in order to obtain an accurate knowledge of the magnitude and the temperature dependence of the magnetic penetration depth in this copper oxide superconductor. Special attention was given to the data analysis. In particular, the systematic errors introduced by different types of analyses were estimated. Our results show that the temperature dependence of the effective penetration depth {lambda}{sub eff} into the sintered sample is well described by the two-fluid model, with {lambda}{sub eff}(0)=155(10) nm. This behavior of {lambda}{sub eff}({ital T}) is consistent with conventional {ital s}-wave pairing. With the anisotropy ratio {gamma}={lambda}{sub {ital c}}/{lambda}{sub {ital a}{ital b}}=5(1) measured in a previous {mu}SR experiment, the penetration depths {lambda}{sub {ital a}{ital b}}(0)=130(10) nm and {lambda}{sub {ital c}}(0)=500--800 nm (parallel and perpendicular to the CuO{sub 2} planes, respectively) were extracted. Our results are compared with those obtained by other experimental techniques and theoretical predictions.

• OSTI ID: 6193751
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 42:13; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
PENETRATION DEPTH
COPPER OXIDES
YTTRIUM OXIDES
ANISOTROPY
MUON SPIN RELAXATION
PEROVSKITE
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
RELAXATION
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties