Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
64 (1988), S. 6087-6091
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Muon spin rotation and relaxation (μSR) techniques have been applied to high-TC and related systems. In the antiferromagnets La2CuO4−y and YBa2Cu3O6.0–6.4, the muon precession frequency in zero field indicates that the microscopic static ordered moments do not change much despite drastic decrease of the Néel temperature with increasing oxygen content. In the family systems of the new three-dimensional superconductor (BaK)BiO3, no signature of static magnetic order was found by μSR, in sharp contrast to the two-dimensional systems with CuO planes. In the superconducting specimens La1.85Sr0.15CuO4 and YBa2Cu3O6.5–7.0, the magnetic field penetration depth λ was determined from the muon spin relaxation rate σ measured in transverse external magnetic fields. The temperature dependence of λ indicates a predominantly finite energy gap. The systematic variation of λ leads to an approximately linear relation TC∝σ∝1/λ2∝ns/m* between the transition temperature TC and the carrier density ns, which suggests a high-energy scale for the pairing interaction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.342127
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