The Route to Supercurrent Transparent Ferromagnetic Barriers in Superconducting Matrix.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30977633.
- Also identified by DOI 10.1021/acsnano.9b00888 and PMC identifier 8830211.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
A ferromagnetic barrier thinner than the coherence length in high-temperature superconductors is realized in the multilayers of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> and La<sub>0.67</sub>Ca<sub>0.33</sub>MnO<sub>3</sub>. We used epitaxial growth of YBCO on ⟨110⟩ SrTiO<sub>3</sub> substrates by pulsed laser deposition to prepare thin superconducting films with copper oxide planes oriented at an angle to the substrate surface. Subsequent deposition of LCMO and finally a second YBCO layer produces a superconductor/ferromagnet/superconductor trilayer containing an ultrathin ferromagnetic barrier with sophisticated geometry at which the long axis of coherence length ovoid of YBCO is pointing across the LCMO ferromagnetic layer. A detailed characterization of this structure is achieved using high-resolution electron microscopy.