Transport studies of YBa2Cu3Oy/YxPr 1-xBa2Cu3Oy and YBa2Cu3Oy/R0.7M 0-3MnO3 superlattices, in which R = La or Nd, and M = Ca or Sr

H. C. Yang; J. C. Chen; L. M. Wang; H. H. Sung; H. E. Horng; S. Y. Yang; J. T. Jeng

doi:10.1016/S0022-3697(01)00116-0

Transport studies of YBa₂Cu₃O_y/Y_xPr _1-xBa₂Cu₃O_y and YBa₂Cu₃O_y/R_0.7M _0-3MnO₃ superlattices, in which R = La or Nd, and M = Ca or Sr

H. C. Yang^*, J. C. Chen, L. M. Wang, H. H. Sung, H. E. Horng, S. Y. Yang, J. T. Jeng

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

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

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Abstract

We report the transport studies of YBa₂Cu₃O_y/Y_xPr _1-xBa₂Cu₃O_y and YBa₂Cu₃Oy/R_1-xM_xMnO ₃ superlattices in magnetic fields in which R = La or Nd, and M = Ca or Sr. The X-ray diffraction of samples shows superlattice structure. The resistive transition in a magnetic field shows thermal activated behavior. The flux pinning is reduced when the coupling strength between YBCO layers is decreased. The angular dependence of the critical current of YBa₂Cu₃O_y/PrBa₂Cu ₃O_y superlattices reveals the dimensionality of superlattices. The magnetoresistance ratio (MR),|Δρ(H = 7 T) - Δρ(H = 0)|/Δρ(H = 7 T), of YBa₂Cu₃O_y/R_1-xM _xMnO₃ superlattices is affected by the layer coupling of R_1-xM_xMnO₃ layers. The enhancement of the MR ratio in the tri-layer YBa₂Cu₃O_y/La_0.7M _0.3MnO₃/YBa₂Cu₃O_y film in the low temperature regime is significant and has a value of 33650% at T = 75 K. We attribute this enhancement of the MR to the ordering of magnetic moment in ferromagnetic layers in magnetic fields. The results are discussed in terms of existing theories.

Original language	English
Pages (from-to)	1837-1846
Number of pages	10
Journal	Journal of Physics and Chemistry of Solids
Volume	62
Issue number	9-10
DOIs	https://doi.org/10.1016/S0022-3697(01)00116-0
Publication status	Published - 2001 Oct

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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@article{8cbda87c01404da98dd4fb170e9b8b63,

title = "Transport studies of YBa2Cu3Oy/YxPr 1-xBa2Cu3Oy and YBa2Cu3Oy/R0.7M 0-3MnO3 superlattices, in which R = La or Nd, and M = Ca or Sr",

abstract = "We report the transport studies of YBa2Cu3Oy/YxPr 1-xBa2Cu3Oy and YBa2Cu3Oy/R1-xMxMnO 3 superlattices in magnetic fields in which R = La or Nd, and M = Ca or Sr. The X-ray diffraction of samples shows superlattice structure. The resistive transition in a magnetic field shows thermal activated behavior. The flux pinning is reduced when the coupling strength between YBCO layers is decreased. The angular dependence of the critical current of YBa2Cu3Oy/PrBa2Cu 3Oy superlattices reveals the dimensionality of superlattices. The magnetoresistance ratio (MR),|Δρ(H = 7 T) - Δρ(H = 0)|/Δρ(H = 7 T), of YBa2Cu3Oy/R1-xM xMnO3 superlattices is affected by the layer coupling of R1-xMxMnO3 layers. The enhancement of the MR ratio in the tri-layer YBa2Cu3Oy/La0.7M 0.3MnO3/YBa2Cu3Oy film in the low temperature regime is significant and has a value of 33650% at T = 75 K. We attribute this enhancement of the MR to the ordering of magnetic moment in ferromagnetic layers in magnetic fields. The results are discussed in terms of existing theories.",

author = "Yang, {H. C.} and Chen, {J. C.} and Wang, {L. M.} and Sung, {H. H.} and Horng, {H. E.} and Yang, {S. Y.} and Jeng, {J. T.}",

note = "Funding Information: The authors thank the financial support of the National Science Council of the Republic of China under the grant no: NSC 89-2112-M002-072. This work is partially supported by the Program for Promoting University Academic Excellence of the Ministry of Education of the Republic of China.",

year = "2001",

month = oct,

doi = "10.1016/S0022-3697(01)00116-0",

language = "English",

volume = "62",

pages = "1837--1846",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Limited",

number = "9-10",

}

TY - JOUR

T1 - Transport studies of YBa2Cu3Oy/YxPr 1-xBa2Cu3Oy and YBa2Cu3Oy/R0.7M 0-3MnO3 superlattices, in which R = La or Nd, and M = Ca or Sr

AU - Yang, H. C.

AU - Chen, J. C.

AU - Wang, L. M.

AU - Sung, H. H.

AU - Horng, H. E.

AU - Yang, S. Y.

AU - Jeng, J. T.

N1 - Funding Information: The authors thank the financial support of the National Science Council of the Republic of China under the grant no: NSC 89-2112-M002-072. This work is partially supported by the Program for Promoting University Academic Excellence of the Ministry of Education of the Republic of China.

PY - 2001/10

Y1 - 2001/10

N2 - We report the transport studies of YBa2Cu3Oy/YxPr 1-xBa2Cu3Oy and YBa2Cu3Oy/R1-xMxMnO 3 superlattices in magnetic fields in which R = La or Nd, and M = Ca or Sr. The X-ray diffraction of samples shows superlattice structure. The resistive transition in a magnetic field shows thermal activated behavior. The flux pinning is reduced when the coupling strength between YBCO layers is decreased. The angular dependence of the critical current of YBa2Cu3Oy/PrBa2Cu 3Oy superlattices reveals the dimensionality of superlattices. The magnetoresistance ratio (MR),|Δρ(H = 7 T) - Δρ(H = 0)|/Δρ(H = 7 T), of YBa2Cu3Oy/R1-xM xMnO3 superlattices is affected by the layer coupling of R1-xMxMnO3 layers. The enhancement of the MR ratio in the tri-layer YBa2Cu3Oy/La0.7M 0.3MnO3/YBa2Cu3Oy film in the low temperature regime is significant and has a value of 33650% at T = 75 K. We attribute this enhancement of the MR to the ordering of magnetic moment in ferromagnetic layers in magnetic fields. The results are discussed in terms of existing theories.

AB - We report the transport studies of YBa2Cu3Oy/YxPr 1-xBa2Cu3Oy and YBa2Cu3Oy/R1-xMxMnO 3 superlattices in magnetic fields in which R = La or Nd, and M = Ca or Sr. The X-ray diffraction of samples shows superlattice structure. The resistive transition in a magnetic field shows thermal activated behavior. The flux pinning is reduced when the coupling strength between YBCO layers is decreased. The angular dependence of the critical current of YBa2Cu3Oy/PrBa2Cu 3Oy superlattices reveals the dimensionality of superlattices. The magnetoresistance ratio (MR),|Δρ(H = 7 T) - Δρ(H = 0)|/Δρ(H = 7 T), of YBa2Cu3Oy/R1-xM xMnO3 superlattices is affected by the layer coupling of R1-xMxMnO3 layers. The enhancement of the MR ratio in the tri-layer YBa2Cu3Oy/La0.7M 0.3MnO3/YBa2Cu3Oy film in the low temperature regime is significant and has a value of 33650% at T = 75 K. We attribute this enhancement of the MR to the ordering of magnetic moment in ferromagnetic layers in magnetic fields. The results are discussed in terms of existing theories.

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U2 - 10.1016/S0022-3697(01)00116-0

DO - 10.1016/S0022-3697(01)00116-0

M3 - Article

AN - SCOPUS:0035479851

SN - 0022-3697

VL - 62

SP - 1837

EP - 1846

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 9-10

ER -

Transport studies of YBa₂Cu₃O_y/Y_xPr _1-xBa₂Cu₃O_y and YBa₂Cu₃O_y/R_0.7M _0-3MnO₃ superlattices, in which R = La or Nd, and M = Ca or Sr

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