Frequency dependence of ultrasound attenuation in II-type superconductor

Author

Polzikova, N.I. ; Raevskii, A.O. ; Mansfeld, G.D.

Author_Institution

Inst. of Radio Eng., Acad. of Sci., Moscow, Russia

Volume

2

fYear

1998

fDate

1998

Firstpage

1227

Abstract

It has been theoretically shown that ultrasound attenuation due to magnetic vortices in type II superconductor exhibits local temperature and frequency maxima. The absolute maximum occurs at frequency corresponding to that for thermally activated vortex hopping. It was shown that vortex elasticity gives rise an additional solution of wave equation that significantly manifests itself in the case of strong surface pinning. For different surface pinning conditions the impedances of acoustic resonator were calculated

Keywords

flux pinning; flux-line lattice; type II superconductors; ultrasonic absorption; II-type superconductor; absolute maximum; acoustic resonator impedances; frequency dependence; magnetic vortices; strong surface pinning; thermally activated vortex hopping; ultrasound attenuation; vortex elasticity; wave equation; Attenuation; Elasticity; Frequency dependence; Magnetoelasticity; Partial differential equations; Superconducting magnets; Surface acoustic waves; Temperature; Type II superconductors; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE

Conference_Location

Sendai

ISSN

1051-0117

Print_ISBN

0-7803-4095-7

Type

conf

DOI

10.1109/ULTSYM.1998.765060

Filename

765060