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

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)1837-1846
期刊Journal of Physics and Chemistry of Solids
出版狀態已發佈 - 2001 十月

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

指紋 深入研究「Transport studies of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>/Y<sub>x</sub>Pr <sub>1-x</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> and YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>/R<sub>0.7</sub>M <sub>0-3</sub>MnO<sub>3</sub> superlattices, in which R = La or Nd, and M = Ca or Sr」主題。共同形成了獨特的指紋。