Dependence of Sound Amplification on Temperature Distribution in Annular Thermoacoustic Engines

us to test experimentally the prevailing philosophy that the pressure dependence of power law creep can be expressed by an activation volume, QV*, that

From the estimated variation of ordered moment in Er [6] and Kasuya's estimates of the anisotropy the value of L-K(0) at this temperature is approxi- mately 0.5

The measurement of the temperature dependence and spectral response of the photoconductivity (PC) were undertaken to help resolve questions concerning the nature

Furthermore, the results give a new physical insight on the processes which control the saturation of the acoustic wave: it is demonstrated that the acoustically induced reduc- tion

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des

radiated the initial sound wave pulses at the frequency 0/276=25 hTHz.The pulse duration could be varied from 0.1 to 10 ps.The radiated pulse reflected from the cylindrical

We report in this letter measurements of the sound velocity in a metallic amorphous material which show a behaviour very similar to that observed in amorphous

In order to establish more precisely the be- havior in this interesting region of wave vectors, and hopefully to achieve a better understanding of possible decay or interference