Magnetic phase diagrams of electron-doped high-Tc cuprates Pr1-xLaCexCuO4-δ and Nd2-xCexCuO4-δ studied by μSR measurements

T. Kubo, T. Uefuji, M. Fujita, K. Yamada, I. Watanabe, K. Nagamine

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Magnetic phase diagrams of electron-doped high-temperature superconducting (SC) cuprates Nd2-xCexCuO4-δ (NCCO) and Pr1-xLaCexCuO4-δ (PLCCO) has been studied by means of muon spin relaxation and rotation (μSR) measurements. Two characteristic temperatures TN1 and TN2 are defined in the zero-field μSR (ZF-μSR) measurements for both NCCO and PLCCO. Below T = TN1, which approximately corresponds to the previously reported Néel temperature, an exponential type muon spin relaxation firstly appears in the time spectra and upon cooling below around TN2 another faster component of relaxation or muon spin rotation is observed similarly. Although critical concentration for the bulk superconductivity is different between the two systems, antiferromagnetic (AF) phase contacts with the SC phase partially overlapping in both systems and AF phase is suddenly reduced in the appearance of SC phase, suggesting a competition between superconductivity and AF order. Our quantitative analyses of the AF volume fraction clearly demonstrate this.

Original languageEnglish
Pages (from-to)354-359
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes

Keywords

  • Electron-doped high-T
  • NCCO
  • Néel temperature
  • PLCCO
  • Phase diagram
  • μSR

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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