Studies of longitudinal and transverse resistivities of YBa2Cu3Oy/R0.7M0.3MnO 3 superlattices, in which R = La or Nd and M = Ca or Sr

J. C. Chen; H. C. Yang; L. M. Wang; H. E. Horng

doi:10.1088/0953-2048/15/7/302

Studies of longitudinal and transverse resistivities of YBa₂Cu₃O_y/R_0.7M_0.3MnO ₃ superlattices, in which R = La or Nd and M = Ca or Sr

J. C. Chen^*, H. C. Yang, L. M. Wang, H. E. Horng

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We measured the longitudinal and transverse Hall resistivities of YBa₂Cu₃O_y/R_1-xM_xMnO₃ 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 YBa₂Cu₃O_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 YBa₂Cu₃O_y/R_1-xM_xMnO₃ superlattice is affected by the coupling strength of R_1-xM_xMnO₃ 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 language	English
Pages (from-to)	1011-1016
Number of pages	6
Journal	Superconductor Science and Technology
Volume	15
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/15/7/302
Publication status	Published - 2002 Jul

ASJC Scopus subject areas

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

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title = "Studies of longitudinal and transverse resistivities of YBa2Cu3Oy/R0.7M0.3MnO 3 superlattices, in which R = La or Nd and M = Ca or Sr",

abstract = "We measured the longitudinal and transverse Hall resistivities of YBa2Cu3Oy/R1-xMxMnO3 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 YBa2Cu3Oy 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 YBa2Cu3Oy/R1-xMxMnO3 superlattice is affected by the coupling strength of R1-xMxMnO3 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.",

author = "Chen, {J. C.} and Yang, {H. C.} and Wang, {L. M.} and Horng, {H. E.}",

year = "2002",

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doi = "10.1088/0953-2048/15/7/302",

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journal = "Superconductor Science and Technology",

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T1 - Studies of longitudinal and transverse resistivities of YBa2Cu3Oy/R0.7M0.3MnO 3 superlattices, in which R = La or Nd and M = Ca or Sr

AU - Chen, J. C.

AU - Yang, H. C.

AU - Wang, L. M.

AU - Horng, H. E.

PY - 2002/7

Y1 - 2002/7

N2 - We measured the longitudinal and transverse Hall resistivities of YBa2Cu3Oy/R1-xMxMnO3 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 YBa2Cu3Oy 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 YBa2Cu3Oy/R1-xMxMnO3 superlattice is affected by the coupling strength of R1-xMxMnO3 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.

AB - We measured the longitudinal and transverse Hall resistivities of YBa2Cu3Oy/R1-xMxMnO3 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 YBa2Cu3Oy 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 YBa2Cu3Oy/R1-xMxMnO3 superlattice is affected by the coupling strength of R1-xMxMnO3 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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JO - Superconductor Science and Technology

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Studies of longitudinal and transverse resistivities of YBa₂Cu₃O_y/R_0.7M_0.3MnO ₃ superlattices, in which R = La or Nd and M = Ca or Sr

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