Studies of longitudinal and transverse resistivities of YBa 2 Cu 3 O y /R 0.7 M 0.3 MnO 3 superlattices, in which R = La or Nd and M = Ca or Sr

J. C. Chen, Hong-Chang Yang, L. M. Wang, Herng-Er Horng

    Research output: Contribution to journalArticle

    Abstract

    We measured the longitudinal and transverse Hall resistivities of YBa 2 Cu 3 O y /R 1-x M x MnO 3 superlattices in magnetic fields to study the transport properties, in which R = La or Nd and M = Ca or Sr. The resistive transition in the magnetic field shows a thermally activated flux flow behaviour. The flux pinning ability of the superlattice is reduced when the coupling strength between YBa 2 Cu 3 O y layers is decreased. The transverse Hall resistivity shows sign reversal for samples with strong pinning ability. The sign reversal diminishes as the pinning force is reduced. The magnetoresistance (MR) ratio, |Δρ(H) - Δρ(H = 0)|/Δρ(H), of the YBa 2 Cu 3 O y /R 1-x M x MnO 3 superlattice is affected by the coupling strength of R 1-x M x MnO 3 layers. The peak values of the MR ratio were shifted to lower temperatures in superlattices due to the lowering of the magnetic ordering in ferromagnetic layers.

    Original languageEnglish
    Pages (from-to)1011-1016
    Number of pages6
    JournalSuperconductor Science and Technology
    Volume15
    Issue number7
    DOIs
    Publication statusPublished - 2002 Jan 1

    Fingerprint

    Superlattices
    Magnetoresistance
    superlattices
    Magnetic fields
    Flux pinning
    electrical resistivity
    Transport properties
    Magnetization
    flux pinning
    Fluxes
    magnetic fields
    transport properties
    Temperature

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Condensed Matter Physics
    • Metals and Alloys
    • Electrical and Electronic Engineering
    • Materials Chemistry

    Cite this

    Studies of longitudinal and transverse resistivities of YBa 2 Cu 3 O y /R 0.7 M 0.3 MnO 3 superlattices, in which R = La or Nd and M = Ca or Sr . / Chen, J. C.; Yang, Hong-Chang; Wang, L. M.; Horng, Herng-Er.

    In: Superconductor Science and Technology, Vol. 15, No. 7, 01.01.2002, p. 1011-1016.

    Research output: Contribution to journalArticle

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    abstract = "We measured the longitudinal and transverse Hall resistivities of YBa 2 Cu 3 O y /R 1-x M x MnO 3 superlattices in magnetic fields to study the transport properties, in which R = La or Nd and M = Ca or Sr. The resistive transition in the magnetic field shows a thermally activated flux flow behaviour. The flux pinning ability of the superlattice is reduced when the coupling strength between YBa 2 Cu 3 O y layers is decreased. The transverse Hall resistivity shows sign reversal for samples with strong pinning ability. The sign reversal diminishes as the pinning force is reduced. The magnetoresistance (MR) ratio, |Δρ(H) - Δρ(H = 0)|/Δρ(H), of the YBa 2 Cu 3 O y /R 1-x M x MnO 3 superlattice is affected by the coupling strength of R 1-x M x MnO 3 layers. The peak values of the MR ratio were shifted to lower temperatures in superlattices due to the lowering of the magnetic ordering in ferromagnetic layers.",
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