Dependence of Tc on hydrostatic pressure in a 123 superconductor
Department of Physics, Washington University C. B. 1105, One Brookings Dr., St. Louis, MO 63130, USA
2 Department of Physics and Crown Center for Superconductivity Technion, Haifa 32000, Israel
Published online: 15 May 2000
Hydrostatic pressure studies on the tetragonal 123 superconductor (LaCax) (BaLa)Cu3Oy for x=0.1 and variable oxygen content y show that Tc increases rapidly under pressure (+5 K/GPa) for underdoped, optimally doped and overdoped samples. This points to a common cause for the pressure-induced changes in the superconductivity at all levels of doping, with negligible effects from charge transfer. Weak relaxation behavior in Tc is observed only for the most underdoped sample.
PACS: 74.62.-c – Transition temperature variations / 74.62.Fj – Pressure effects / 74.72.Jt – Other cuprates
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000