Field-Modulated Microwave Absorption in Granular Superconductors: First and Second Harmonic Signals

  • M. Požek
  • A. Dulčić
  • B. Rakvin
Conference paper


The dependence of the microwave absorption on the applied magnetic fields was extensively studied in high-Tc copper-oxide superconductors. The first harmonic lock-in detection of the modulated absorption did not result in the expected first derivative signals (1-3]. The second harmonic lock-in detection of the modulated absorption was also reported (4). In contrast to the first harmonic signals, the second harmonic signals showed no hysteresis at low modulation amplitudes, while a small hysteresis appeared at large modulation amplitudes.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • M. Požek
    • 1
  • A. Dulčić
    • 1
    • 2
  • B. Rakvin
    • 1
  1. 1.Ruder Bošković InstituteUniversity of ZagrebZagrebCroatia, Yugoslavia
  2. 2.Department of Physics, Faculty of Natural Sciences and MathematicsUniversity of ZagrebZagrebCroatia, Yugoslavia

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