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Transport properties of HTS/CMR/HTS multilayers for spin injection devices

Journal Article


Abstract


  • YBa2Cu3O7ô high temperature superconductors (YBCO), as well as the layered manganite La2/3Sr1/3MnO3 (LSMO) are layered metallic systems where the interlayer current transport occurs via sequential tunneling of charge carriers. We present in this paper experimental results of magneto-transport studies carried out on YBa2Cu3O7ô/La2/3Sr1/3MnO3/YBa2Cu3O7ô (YBCO/LSMO/YBCO) thin film multilayers. The YBCO/LSMO/YBCO heterostructures were grown on SrTiO3 (STO) substrates by pulsed laser deposition. The close lattice match among the constituent layers of the perovskite YBCO/LSMO/YBCO and the substrate facilitates epitaxial film growth, thus minimizing strong spin-flip scattering at the interface. The temperature dependence of the resistance for different bias currents shows that these heterostructures are clearly influenced by both the insulator-to-metal transition of the LSMO layers at 330 K and the stripe fluctuations in the conductivity of the YBCO layers at the onset of electronic inhomogeneity at 240 K. The samples show a drop between 19% and 22% in the resistance for the c-axis tunneling currents varying from I = 0.051.0 mA at the critical temperature T* 240 K. This behavior could be related to the opening of a pseudogap. The investigation of these promising hybrid structures is aimed at understanding the science of new spin-based devices.

Publication Date


  • 2007

Citation


  • Alvarez, G. G., Wang, X., Peleckis, G., Shi, D. & Dou, S. Xue. (2007). Transport properties of HTS/CMR/HTS multilayers for spin injection devices. Physica C: Superconductivity and its Applications, 460-462 (Part 1), 438-439.

Scopus Eid


  • 2-s2.0-34548188184

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/222

Has Global Citation Frequency


Number Of Pages


  • 1

Start Page


  • 438

End Page


  • 439

Volume


  • 460-462

Issue


  • Part 1

Abstract


  • YBa2Cu3O7ô high temperature superconductors (YBCO), as well as the layered manganite La2/3Sr1/3MnO3 (LSMO) are layered metallic systems where the interlayer current transport occurs via sequential tunneling of charge carriers. We present in this paper experimental results of magneto-transport studies carried out on YBa2Cu3O7ô/La2/3Sr1/3MnO3/YBa2Cu3O7ô (YBCO/LSMO/YBCO) thin film multilayers. The YBCO/LSMO/YBCO heterostructures were grown on SrTiO3 (STO) substrates by pulsed laser deposition. The close lattice match among the constituent layers of the perovskite YBCO/LSMO/YBCO and the substrate facilitates epitaxial film growth, thus minimizing strong spin-flip scattering at the interface. The temperature dependence of the resistance for different bias currents shows that these heterostructures are clearly influenced by both the insulator-to-metal transition of the LSMO layers at 330 K and the stripe fluctuations in the conductivity of the YBCO layers at the onset of electronic inhomogeneity at 240 K. The samples show a drop between 19% and 22% in the resistance for the c-axis tunneling currents varying from I = 0.051.0 mA at the critical temperature T* 240 K. This behavior could be related to the opening of a pseudogap. The investigation of these promising hybrid structures is aimed at understanding the science of new spin-based devices.

Publication Date


  • 2007

Citation


  • Alvarez, G. G., Wang, X., Peleckis, G., Shi, D. & Dou, S. Xue. (2007). Transport properties of HTS/CMR/HTS multilayers for spin injection devices. Physica C: Superconductivity and its Applications, 460-462 (Part 1), 438-439.

Scopus Eid


  • 2-s2.0-34548188184

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/222

Has Global Citation Frequency


Number Of Pages


  • 1

Start Page


  • 438

End Page


  • 439

Volume


  • 460-462

Issue


  • Part 1