Article (Scientific journals)
Microwave properties of DyBa2 Cu3O7-x monodomains and related compounds in magnetic fields
Pompeo, N; Silva, E; Ausloos, Marcel et al.
2008In Journal of Applied Physics, 103 (10)
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Abstract :
[en] We present a microwave characterization of a DyBa2 Cu 3O7-x single domain, grown by the top-seeded melt-textured technique. We report the (a,b) plane field-induced surface resistance, Δ Rs (H), at 48.3 GHz, measured by means of a cylindrical metal cavity in the end-wall-replacement configuration. Changes in the cavity quality factor Q against the applied magnetic field yield Δ Rs(H) at fixed temperatures. The temperature range (70 K; Tc) was explored. The magnetic field μ0 H<0.8 T was applied along the c axis. The field dependence of Δ Rs(H) does not exhibit the steep, steplike increase at low fields typical of weak links. This result indicates the single-domain character of the sample under investigation. Δ R s(H) exhibits a nearly square-root dependence on H, as expected for fluxon motion. From the analysis of the data in terms of motion of Abrikosov vortices, we estimate the temperature dependences of the London penetration depth λ and the vortex viscosity μ and their zeroerature values λ (0) =165 nm and μ (0) =3× 10-7 N s m-2, which are found in excellent agreement with reported data in YBa2 Cu3O7-x single crystals. Comparison of microwave properties with those of related samples indicates the need for reporting data as a function of T/ Tc in order to obtain universal laws. © 2008 American Institute of Physics.
Disciplines :
Chemistry
Author, co-author :
Pompeo, N;  Dipartimento di Fisica E. Amaldi, Unità CNISM, Università Roma Tre, I-00146 Roma, Via della Vasca Navale 84, Italy
Silva, E;  Dipartimento di Fisica E. Amaldi, Unità CNISM, Università Roma Tre, I-00146 Roma, Via della Vasca Navale 84, Italy
Ausloos, Marcel ;  Université de Liège - ULiège > Département de physique ; SUPRATECS, B5a, B-4000 Lìge, Belgium
Cloots, Rudi ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat ; ULg - Université de Liège > SUPRATECS, Department of Chemistry (B6)
Language :
English
Title :
Microwave properties of DyBa2 Cu3O7-x monodomains and related compounds in magnetic fields
Publication date :
2008
Journal title :
Journal of Applied Physics
ISSN :
0021-8979
eISSN :
1089-7550
Publisher :
American Institute of Physics (AIP), Us ny
Volume :
103
Issue :
10
Peer reviewed :
Peer Reviewed verified by ORBi
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