TY  - JOUR
AU  - Wördenweber, R.
AU  - Hollmann, E.
AU  - Schubert, J.
AU  - Kutzner, R.
AU  - Panaitov, G.
TI  - Flux transport in nanostructured high-Tc films at microwave frequencies
JO  - Physica / C
VL  - 479
SN  - 0921-4534
CY  - Amsterdam
PB  - North-Holland Physics Publ.
M1  - PreJuSER-22627
SP  - 69 - 73
PY  - 2012
N1  - The authors would like to thank A. Offenhauser, V. Misko, T. Grellmann, K. Greben, and H. P. Bochem for their valuable support. This work was supported by the ESF program "Nanoscience and Engineering in Superconductivity - NES".
AB  - The understanding of flux transport in micro-and nanostructured superconducting systems that are exposed to an electromagnetic field at microwave frequencies is of interest for basic aspects of vortex matter and for potential application of superconductivity in fluxonic devices. We report on the combination of dc and microwave electronic measurements on submicron-patterned high-T-c films. The frequency dependence of the forward transmission coefficient S-21 indicates that the mechanism of flux transport depends on the velocity of vortices. At low frequencies, flux transport via Abrikosov vortices is present leading to additional microwave losses. Above a geometrically defined frequency, a different, loss-free mechanism seems to be responsible for flux transport. This mechanism most likely represents a phase-slip type of mechanism. The limiting vortex velocity obtained from the frequencies dependence of the microwave properties agrees with the Larkin-Ovchinnikov critical vortex velocity determined via dc pulse measurements. In spite of the change of mechanism, guidance of flux persists in these nano-patterns up to high frequencies. (C) 2012 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000308580600015
DO  - DOI:10.1016/j.physc.2011.12.018
UR  - https://juser.fz-juelich.de/record/22627
ER  -