Vol. 13, no.4, 2021



Karen Y. Constantinian, Gennady A. Ovsyannikov, Yulii V. Kislinski, Andrey M. Petrzhik

Kotelnikov Institute of Radioengineering and Electronics of RAS, http://www.cplire.ru/
Moscow 125009, Russian Federation
E-mail: karen@hitech.cplire.ru, gena@hitech.cplire.ru, yulii@hitech.cplire.ru, petrzhik@hitech.cplire.ru
Anton V. Shadrin
Moscow Institute of Physics and Technology, https://mipt.ru/
Dolgoprudny 141701, Moscow Region, Russian Federation
E-mail: anton_sh@hitech.cplire.ru
Alexei S. Kalaboukhov
Chalmers University of Technology, https://www.chalmers.se/
SE-412 96 Göteborg, Sweden
E-mail: alexei.kalaboukhov@chalmers.se

Received Oktober 20, 2021, peer-reviewed Oktober 27, 2021, accepted November 08, 2021

Abstract: Electron transport processes in oxide superconducting heterostructures with epitaxially grown magnetic thin-film interlayers, in which the interaction of superconducting correlations and magnetic ordering occurs due to superconducting and magnetic proximity effects, have been studied experimentally. Hybrid mesa-heterostructures were prepared from thin-film bottom cuprate superconductor (S), magnetic (M) interlayer made of manganite or an antiferromagnetic cuprate, and the upper electrode made from an ordinary superconductor. When the cuprate antiferromagnetic material was replaced by a ferromagnetic manganite interlayer, the superconducting current was suppressed, although the thin magnetic film was several times thinner, 5 nm, and the temperature was lowered to 0.3 K. At low temperatures dependences of differential resistance vs. voltage for mesa-heterostructures with manganite interlayer featured mini-gap low-energy states.

Keywords: superconducting heterostructures, thin films, manganites, cuprates, differential conductivity, exchange energy

PACS: 74.45.+c, 74.72.−h, 75.47.Lx, 73.63.−b

RENSIT, 2021, 13(4):471-478 DOI: 10.17725/rensit.2021.13.471.

Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/413/13(4)471-478pdf