Open AccessThe Route to Supercurrent Transparent Ferromagnetic Barriers in Superconducting Matrix
Author(s) -
Yurii P. Ivanov,
S. Soltan,
J. Albrecht,
E. Goering,
Gisela Schütz,
Zaoli Zhang,
Andrey Chuvilin
Publication year - 2019
Publication title -
acs nano
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.554
H-Index - 382
eISSN - 1936-086X
pISSN - 1936-0851
DOI - 10.1021/acsnano.9b00888
Subject(s) - materials science , ferromagnetism , superconductivity , supercurrent , condensed matter physics , coherence length , epitaxy , pulsed laser deposition , substrate (aquarium) , thin film , layer (electronics) , nanotechnology , josephson effect , physics , oceanography , geology
A ferromagnetic barrier thinner than the coherence length in high-temperature superconductors is realized in the multilayers of YBa 2 Cu 3 O 7-δ and La 0.67 Ca 0.33 MnO 3 . We used epitaxial growth of YBCO on ⟨110⟩ SrTiO 3 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.