Resistance Anomalies at Superconducting Transition in Multilayer N/S/F/S/N Heterostructures

  • Norbert Gál
  • Vladimír Štrbík
  • Štefan Gaži
  • Štefan Chromik
  • Marcel Talacko
Original Paper
  • 19 Downloads

Abstract

We have prepared lateral N/S/F/S/N heterostructures from perovskite bilayer YBa2Cu3O7−x (YBCO (70 nm), as superconductor S) and La1−xSr x MnO3 (LSMO (30 nm), as ferromagnet F) covered ex situ by Au layer (normal metal N, 50 nm) and Ti layer (50 nm). Whereas the Ti layer serves as a mask at Ar+ ion beam etching, the gold layer protects the properties of bilayer LSMO/YBCO during the fabrication process mainly during Ga+ focused ion beam etching. In many cases, the resistance vs. temperature (R(T)) dependences of the heterostructures exhibited some peculiarities (resistance peaks and dips) at superconducting transition. To explain these anomalies, we used transport effects emerging between resistances of individual layers and resistances of their interfaces. Our simulations fit very well the experimental \({R(T)}\) dependences of N/S/F/S/N heterostructures and show that transport effects can play an important role in multilayer structures which can be used in spintronics.

Keywords

N/S/F/S/N heterostructures Resistance anomalies Transport effects Simulations 

Notes

Funding Information

This work was supported by the Slovak Research and Development Agency under the contract no. APVV-16-0315. We acknowledge the grant agency VEGA for financial support in project no. 2/0117/18.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Norbert Gál
    • 1
  • Vladimír Štrbík
    • 1
  • Štefan Gaži
    • 1
  • Štefan Chromik
    • 1
  • Marcel Talacko
    • 1
  1. 1.Institute of Electrical Engineering SASBratislavaSlovakia

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