Surface impedance anisotropy of YBa2Cu3O6.95 single crystals: Electrodynamic basis of the measurements

Article

关键词: PENETRATION DEPTH;    TEMPERATURE-DEPENDENCE;    MICROWAVE RESPONSE;    COMPLEX CONDUCTIVITY;    BAZRO3 CRUCIBLES;    INPLANE;    SUPERCONDUCTORS;    YBA2CU3O7-DELTA;   

DOI  :  10.1103/PhysRevB.67.144504

来源: SCIE

【 摘 要 】

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>a>c in a microwave magnetic field H(omega)perpendicular toab. To obtain the c-axis complex conductivity from measurements at H(omega)parallel toab, 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=9.4 GHz in its normal and superconducting states. All of them proved to be linear at T

【 授权许可】

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