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Article overview
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Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems | | N. Pompeo
; R. Rogai
; M. Ausloos
; R. Cloots
; A. Augieri
; G. Celentano
; E. Silva
; | | Date: |
4 Mar 2011 | | Abstract: | We report on microwave measurements on DyBa$_2$Cu$_3$O$_{7-
mdelta}$
monodomains grown by the top-seeded melt-textured technique. We measured the
field increase of the surface resistance $R_{
m s}(H)$ in the a-b plane at
48.3 GHz. Measurements were performed at fixed temperatures in the range 70 K -
$T_{
m c}$ with a static magnetic field $mu_0H<0.8$ T parallel to the c-axis.
Low field steep increase of the dissipation, typical signature of the presence
of weak links, is absent, thus indicating the single-domain behaviour of the
sample under study. The magnetic field dependence of $R_{
m s}(H)$ is ascribed
to the dissipation caused by vortex motion. The analysis of $X_{
m s}(H)$
points to a free-flow regime, thus allowing to obtain the vortex viscosity as a
function of temperature. We compare the results with those obtained on RE-BCO
systems. In particular, we consider strongly pinned films of
YBa$_2$Cu$_3$O$_{7-
mdelta}$ with nanometric BaZrO$_3$ inclusions. | | Source: | arXiv, 1103.0858 | | Services: | Forum | Review | PDF | Favorites | |
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