Singlet-ground-state paramagnetic centers in CuO[sub 2] layers as seen from [sup 169]Tm NMR in TmBa[sub 2]Cu[sub 3]O[sub 6+[ital x]] superconductors

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.51.693· OSTI ID:6701493

Bakharev, O N; Witteveen, J; Brom, H B ^[1]; Krjukov, E V; Marvin, O B; Teplov, M A ^[2]

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1. Leiden University, P.O. Box 9506, RA 2300 Leiden (Netherlands)
2. Kazan State University, 420008 Kazan (Russian Federation)

The [sup 169]Tm nuclear spin-lattice relaxation in oxygen-deficient TmBa[sub 2]Cu[sub 3]O[sub 6+[ital x]] compounds, as quenched and room-temperature annealed, has been measured at low temperatures. The results are consistent with the existence of paramagnetic centers in the CuO[sub 2] double layer, which have a nonmagnetic (singlet) ground state separated from an excited magnetic state by an energy gap of the order of 1 K.

• OSTI ID: 6701493
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:1; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOY SYSTEMS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELEMENTS
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
MAGNETISM
METALS
OXIDES
OXYGEN COMPOUNDS
PARAMAGNETISM
QUATERNARY ALLOY SYSTEMS
RARE EARTH COMPOUNDS
RARE EARTHS
RELAXATION
SPIN-LATTICE RELAXATION
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THULIUM
THULIUM COMPOUNDS
THULIUM OXIDES
TRANSITION ELEMENT COMPOUNDS