UNIGE document Scientific Article
previous document  unige:118543  next document
add to browser collection
Title

Specific heat of YBa2Cu3O7−δ ceramics with single and double superconducting transitions in magnetic fields up to 14 T

Authors
Wang, Ke Qin
Published in Physica C: Superconductivity and Its Applications. 1995, vol. 241, no. 3-4, p. 301-310
Abstract The specific heat of porous YBa2Cu3O≈7.00 ceramics with two well separated steps at the superconducting transition was measured in magnetic fields up to 14 T. The same measurements were performed for an YBa2Cu3O≈6.93 ceramics from a similar batch annealed reversibly to obtain one single sharp transition. The results show that both components of the double transition, as well as the single transition, are transformed in the same way under the application of a field, both in position and width. It is concluded that both components of the split transition are of superconducting origin, and are related with the existence of two kinds of homogeneous domains, the typical sizes of which are large compared to the superconducting coherence length. Depending on the criterion chosen for the definition of Tc (H), the angle-averaged critical-field slopes μ0∂Hc2/∂T|Tc are found to range from −5.4 to − 10.1 T/K for all transitions. The slopes for both components of the split transition are equal within ±10%.
Identifiers
Full text
Structures
Citation
(ISO format)
MIRMELSTEIN, Alexey et al. Specific heat of YBa2Cu3O7−δ ceramics with single and double superconducting transitions in magnetic fields up to 14 T. In: Physica C: Superconductivity and Its Applications, 1995, vol. 241, n° 3-4, p. 301-310. doi: 10.1016/0921-4534(94)02384-0 https://archive-ouverte.unige.ch/unige:118543

109 hits

0 download

Update

Deposited on : 2019-05-31

Export document
Format :
Citation style :