D.-N. Peligrad

An ac method for the precise measurement of Q-factor and resonance frequency of a microwave cavity

We have developed a new and fast method for the determination of the complex frequency shift of a microwave resonant cavity. The method is based on frequency modulation of the microwave source around the cavity resonance and detection of the 2nd and 4th harmonic of the modulation frequency. With this procedure the static measurement of the response amplitude is not necessary and all the data are obtained through a single ac channel. The optimal frequency deviation is shown to be comparable to the cavity resonance width.

Correlation gap in the heavy-fermion antiferromagnet UPd 2 Al 3

The optical properties of the heavy-fermion compound

Flux-pinning effects in field-modulated microwave absorption of YBa2Cu3O7−δ thin films

{\mathrm{UPd}}_{2}{\mathrm{Al}}_{3}

Comparative investigation of intrinsic Josephson contacts in HTC superconductors by modulated microwave absorption measurements

have been measured in a frequency range from 0.04 to 5 meV

Short-wavelength cutoff effects in the ac fluctuation conductivity of superconductors

(0.3\char21{}40{\mathrm{cm}}^{\ensuremath{-}1})

Critical fluctuations and pseudogap observed in the microwave conductivity of BSCCO and YBCO thin films

at temperatures

Dynamics of flux lines studied by modulated microwave absorption

2\mathrm{K}lTl300\mathrm{K}.

Dynamic response of the vortex lattice measured by microwave absorption

Below the coherence temperature

Study of the pinning potential in Bi2Sr2CaCu2O8+δ HTSC by dc magnetization measurements in the subcritical dynamic flux creep regime

{T}^{*}\ensuremath{\approx}50\mathrm{K},

Cavity perturbation by superconducting films in microwave magnetic and electric fields

a hybridization gap opens around 10 meV. As the temperature decreases further