Magnetism and superconductivity of an electron-doped superconductor (Sr1-xLax)2

K. M. Kojima, K. Kawashima, Masaki Fujita, K. Yamada, M. Azuma, M. Takano, A. Koda, K. Ohishi, W. Higemoto, R. Kadono, Y. J. Uemura

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)207-210
Number of pages4
JournalPhysica B: Condensed Matter
Volume374-375
DOIs
Publication statusPublished - 2006 Mar 31
Externally publishedYes
EventProceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance -
Duration: 2005 Aug 82005 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

Fingerprint Dive into the research topics of 'Magnetism and superconductivity of an electron-doped superconductor (Sr<sub>1-x</sub>La<sub>x</sub>)<sub>2</sub>'. Together they form a unique fingerprint.

Cite this