𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Observation of double sign reversal of the hall resistance in Y0.55Pr0.45Ba2Cu3O7−δ polycrystalline samples

✍ Scribed by Carlos A.M. dos Santos; M.S. da Luz; A.J.S. Machado

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
274 KB
Volume
408-410
Category
Article
ISSN
0921-4534

No coin nor oath required. For personal study only.

✦ Synopsis

In order to study Hall effect in Y 0:55 Pr 0:45 Ba 2 Cu 3 O 7Àd polycrystalline samples we have measured longitudinal and transverse voltages at low magnetic field using Van der Pauw technique. The results of the Hall resistance R XY as a function of temperature presented double sign reversal which crosses to the positive sign at same temperature in which branching point (T Cj ) of the electrical resistance R XX occurs. Magneto-resistance hysteresis loops demonstrated that the dissipation is dominated by weak coupling between superconducting clusters. The results suggest that the positive Hall voltage at superconducting state is due to quasiparticle current which is in good agreement with the recent discussion about the applying of the resistively shunted junction model to polycrystalline samples.

📜 SIMILAR VOLUMES

H-T phase diagram of DyBa2Cu3O7−δ/(Y0.45
H-T phase diagram of DyBa2Cu3O7−δ/(Y0.45Pr0.55)Ba2Cu3O7−gd multilayers in the mixed state
✍ M. Andersson; P. Fivat; H. Obara; L. Fàbrega; J-M. Triscone; M. Decroux; Ø. Fisc 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 221 KB

From measurements of I-V characteristics of DyBa2Cu307.5/(¥0.45Pr0.55)Ba2Cu307-5 multilayers, we have experimentally determined the characteristic temperature separating the vortex liquid from the vortex solid. We suggest that the cross-over temperature is determined by the anisotropy given by the a

Sign reversal of the fluctuation Hall co
Sign reversal of the fluctuation Hall conductivity in YBa2Cu3O7−δ superconductor
✍ A.V. Samoilov 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 136 KB

The Hall and longitudinal resistivities, Pxv and p~, respectively, of the YBa2Cu3OT\_, epitaxial II changes films have been measured at 80 K< T < 185 K. The fluctuation Hall conductivity cr~y its sign at temperatures T\*(H)> Tc(H=O). The T-dependence of crxyl(Z~ ,If" lz where c~ll is the fluctuation