Joule heating and high frequency nonlinear effects in the surface impedance of high Tc superconductors

Bruno Marcilhac (UMP CNRS/Thales); Cornelis Jacominus Van Der Beek (LSI); Javier Briatico (UMP CNRS/Thales); Javier Villegas (UMP CNRS/Thales); Jean-Claude Mage (UMP CNRS/Thales); Julien Kermorvant (LSI; Rozenn Bernard (UMP CNRS/Thales); Ump CNRS/Thales); Yves Lema\^itre (UMP CNRS/Thales)

arxiv: 0909.4206 · v1 · pith:2DL7HTFKnew · submitted 2009-09-23 · ❄️ cond-mat.supr-con

Joule heating and high frequency nonlinear effects in the surface impedance of high Tc superconductors

Julien Kermorvant (LSI , Ump CNRS/Thales) , Cornelis Jacominus Van Der Beek (LSI) , Jean-Claude Mage (UMP CNRS/Thales) , Bruno Marcilhac (UMP CNRS/Thales) , Yves Lema\^itre (UMP CNRS/Thales) , Javier Briatico (UMP CNRS/Thales) , Rozenn Bernard (UMP CNRS/Thales)

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Javier Villegas (UMP CNRS/Thales)

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classification ❄️ cond-mat.supr-con

keywords surfacedielectricfilmsfunctionheatinghighimpedancemicrowave

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Using the dielectric resonator method, we have investigated nonlinearities in the surface impedance Zs = Rs + jXs of YBa2Cu3O7 thin films at 10 GHz as function of the incident microwave power level and temperature. The use of a rutile dielectric resonator allows us to measure the precise temperature of the films. We conclusively show that the usually observed increase of the surface resistance of YBa2Cu3O7 thin film as function of microwave power is due to local heating.

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Joule heating and high frequency nonlinear effects in the surface impedance of high Tc superconductors

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