2003/02/25 by Yu. A. Nefyodov, M. R. Trunin, М. Р. Трунин +7 · 1 citation
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.67.144504
9 pages, 7 figures. Submitted to Phys.Rev.B 05Jun2002; accepted for publication 21Febr2003
arxiv created 2003/02/25 · openalex publication_date 2003/04/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
An electrodynamic technique is developed for determining the components of surface impedance and complex conductivity tensors of HTSC single crystals on the basis of measured quantities of a quality factor and a resonator frequency shift. A simple formula is obtained for a geometrical factor of a crystal in the form of a plate with dimensions b\ensuremath≫a>c in a microwave magnetic field H_\ensuremathω\ensuremath⊥ab. To obtain the c-axis complex conductivity from measurements at H_\ensuremathω\ensuremath\Vertab, we propose a procedure that takes into account of sample size effects. With the aid of the technique involved temperature dependences of all impedance and conductivity tensors components of YBa2Cu3O6.95 single crystal, grown in BaZrO3 crucible, are determined at a frequency of f=9.4GHz in its normal and superconducting states. All of them proved to be linear at T<Tc/2, and their extrapolation to zero temperature gives the values of residual surface resistance Rab(0)\ensuremath≈40\ensuremathμ\ensuremathΩ and Rc(0)\ensuremath≈0.8m\ensuremathΩ and magnetic-field penetration depth \ensuremathλab(0)\ensuremath≈150nm and \ensuremathλc(0)\ensuremath≈1.55\ensuremathμm.