Abstract
Zero-field (ZF) and transverse-field (TF) μSR measurements have been performed on a superconducting La2CuO4+y crystal with y = 0.12 where excess oxygen is intercalated to form a stage-4 structure. Measurements are made on the same single-crystal sample studied in the neutron scattering measurements of Lee et al. [Phys. Rev. B 60 (1999) 3643] who find that both superconductivity and static incommensurate magnetic modulation develop below Tc ∼ TN ∼ 42 K. The amplitude of the muon precession signal observed in ZF-μSR increases progressively below TN and saturates at T → 0 to the value which indicates that a static magnetic field from Cu moments exists in only a part of muon sites corresponding to a magnetic site fraction of VM = 41%. The observed frequency ∼ 3.5 MHz of the precession signal suggests the development of a large (at least 0.4 μB) static Cu moment near the "magnetic" muon sites. Comparing the TF-μSR results with computer simulations, we obtained VM(T → 0) = 42%.
Original language | English |
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Pages (from-to) | 338-342 |
Number of pages | 5 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 289-290 |
DOIs | |
State | Published - 2000 |
Externally published | Yes |
Event | 8th International Conference on Muon Spin Rotation, Relaxation and Resonance (muSR'99) - Les Diablerets, Switzerland Duration: Aug 30 1999 → Sep 3 1999 |
Funding
This work has been supported by NSF-DMR-98-02000 (at Columbia) and NSF-DMR-97-04532 and DMR-98-08941 (at MIT).
Keywords
- Magnetic site fraction
- Stripes
- Superconductivity
- μSR