Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Growth and characterization of superconductor-ferromagnet thin film heterostructure La1.85Sr0.15CuO4/SrRuO3

  • Kim, Youngdo (Center for Correlated Electron Systems, Institute for Basic Science) ;
  • Sohn, Byungmin (Center for Correlated Electron Systems, Institute for Basic Science) ;
  • Kim, Changyoung (Center for Correlated Electron Systems, Institute for Basic Science)
  • Received : 2021.05.12
  • Accepted : 2021.06.05
  • Published : 2021.06.30
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Abstract

Superconductor-ferromagnet thin film heterostructure is an ideal system for studying the interplay between superconductivity and ferromagnetism. These two antagonistic properties combined in thin film heterostructure create interesting proximity effects such as spin-triplet superconductivity. Thin film heterostructure of optimally doped La2-xSrxCuO4(LSCO) cuprate superconductor and SrRuO3(SRO) ruthenate ferromagnet has been grown by pulsed laser deposition. Its temperature-dependent resistivity and Hall effect measurements show that our LSCO/SRO heterostructure has both superconductivity and ferromagnetism. In the Hall effect measurement results, we find additional hump-like structures appear in the anomalous Hall effect signal in the vicinity of superconducting transition. We conclude that giant magnetoresistance of the LSCO layer distorts the AHE signal, which results in a hump-like structure.

Keywords

Acknowledgement

This work is supported by the Institute for Basic Science (Grant No. IBS-R009-G2).

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