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Effect of Forming Pressure on the Critical Temperature in YBa 2 Cu 3 O 7−δ Superconductors
Author(s) -
AlShibani K.,
AlAql A.,
AlMuezzin A.,
Humeida H.,
Nakhmedov E. P.,
Firat T.,
Öztürk O.,
Saçli Ö. A.
Publication year - 1995
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221890120
Subject(s) - superconductivity , electrical resistivity and conductivity , condensed matter physics , quantum tunnelling , materials science , lattice (music) , high temperature superconductivity , superconducting transition temperature , physics , quantum mechanics , acoustics
The effect of pressure on the critical temperature T c is studied for YBa 2 Cu 3 O 7–δ compounds prepared under various forming pressures. A systematic decrease in lattice parameters is observed with forming pressure. Resistivity measurements show an increase of the onset temperature T c0 with forming pressure. A value of d T c0 /d P ≈ (0.070 ± 0.010) × 10 −8 K/Pa is determined. A new mechanism based on the variation of the interlayer tunneling integral t ⟂ is used to analyse the experiment results.