Open AccessManifestation of room-temperature superconductivity in thin films fabricated of YBa2Cu3O7–δ
Author(s) -
A V Kudriashov,
L. E. Klyachkin,
A. M. Malyarenko,
А. В. Нащекин,
V. V. Romanov,
S. A. Rykov,
N. T. Bagraev
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1236/1/012022
Subject(s) - condensed matter physics , superconductivity , meissner effect , superdiamagnetism , magnetic field , magnetic susceptibility , high temperature superconductivity , thin film , materials science , flux pinning , transition temperature , quantum tunnelling , magnetic flux , physics , nanotechnology , quantum mechanics
We present manifestations of room temperature superconductivity in thin films fabricated of YBa 2 Cu 3 O 7–δ (YBCO) on the substrate of NdGaO 3 (110). We show that the static magnetic susceptibility measurements demonstrate the Meissner effect in weak magnetic fields at room temperature. In addition, the oscillations of the magnetic susceptibility are revealed in external magnetic field, which can be interpreted as the quantization of magnetic flux through inclusions, with superconducting domains around them and the observation of the field-dependent steps that seem to be of evidence the second-order phase transition of domains. The results obtained are in a good agreement with the data of tunneling I-V curves. Finally, we suggest few further experiments that could confirm our hypothesis.