Abstract
We investigated the infinite-layer electron-doped cuprate superconductor (Sr1-xLax)CuO2 with the muon spin relaxation (μSR) technique. Zero-field measurements detect a slowing down of magnetic moments at a characteristic temperature (TN1), below which the volume fraction of the magnetic region increases as the sample is cooled. Below the doping concentration x<0.10, an onset of the (quasi) static order occurs at another characteristic temperature (TN2). The magnetic volume fraction increases under application of a magnetic field, suggesting that magnetism may be enhanced by an external field. As a function of the doping concentration, the superconducting transition temperature (Tc≈42K) remains constant, but the Meissner fraction reaches a maximum at x=0.1. The transverse-field μSR exhibits an increase of the relaxation rate below Tc, which reaches to σ(T→0)≈4.5μs-1 for x=0.1 doping. This relaxation rate is about 4 times larger than the one expected from the Uemura relation, and there may be a contribution from the field-induced magnetism to the relaxation rate.
Original language | English |
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Pages (from-to) | 207-210 |
Number of pages | 4 |
Journal | Physica B: Condensed Matter |
Volume | 374-375 |
DOIs | |
Publication status | Published - 2006 Mar 31 |
Externally published | Yes |
Event | Proceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance - Duration: 2005 Aug 8 → 2005 Aug 12 |
Keywords
- Electron-doped high-T superconductor
- Muon-spin rotation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering