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Nonlinear coupling of sound waves to the flux-line-lattice

✍ Scribed by P. Lemmens; S. Ewert; J. Pankert

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 167 KB
Volume: 185-189
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(91)91260-b

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✦ Synopsis

Sound waves are coupled to the flux-line-lattice (FLL) in the mixed state of type II superconductors via pinning. This interaction leads to an enhanced ultrasonic attenuation whose magnitude is determined by the mobility of the FLL and hence by the magnetoresistivity. Depending on the sound amplitude, the flux-line dynamics is studied from the near equilibrium, linear range up to a strongly nonlinear behaviour at high amplitudes. The results can be interpreted within the framework of thermally activated flux motion under high driving forces.

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