Thermodynamics of HgBa2CaCu2O6−δ superconductor in the critical fluctuation region

Scaling of the Equilibrium Magnetization in the Mixed State of Type-II Superconductors

“…This type of κ(T ) behavior resulted in practically all published analyses, in which the Hao-Clem model was applied to experimental magnetization data. [24][25][26][27][28][29][30][31][32][33][34][35][36] The standard explanation is that because of thermal fluctuations of vortices, which are not accounted for by the model, this approach is inapplicable at higher temperatures. Considering the data presented in Fig.…”

Comment on “Enhanced two-dimensional properties of the four-layered cuprate high-TcsuperconductorTlBa2Ca3Landau1, Ott2 2005Phys. Rev. B6050View full textAdd to dashboardCite

“…1, 4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20 However, we recently demonstrated that the fluctuation induced corrections to the magnetization remain negligibly small up to temperatures very close to T c , 21 thus suggesting a more general inadequacy of the model. While on previous occasions we could only speculate on the origin of the failure of the model, we are now able to show that most likely it is the insufficient accuracy in the calculation of M (H, κ) using the Hao-Clem model.…”

“…1, 4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 Instead of rising some doubts in the validity of the model, this feature was taken as evidence of a particularly strong influence of thermal fluctuations on the sample magnetization at temperatures still well below T c .…”

“…It has been noticed that the use of this model for the interpretation of corresponding M (H) data practically always leads to unphysical results, such as a strong increase of the calculated κ values with increasing temperature. 1,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 Instead of rising some doubts in the validity of the model, this feature was taken as evidence of a particularly strong influence of thermal fluctuations on the sample magnetization at temperatures still well below T c . 1,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20 However, we recently demonstrated that the fluctuation induced corrections to the magnetization remain negligibly small up to temperatures very close to T c , 21 thus suggesting a more general inadequacy of the model.…”

“…1,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 Instead of rising some doubts in the validity of the model, this feature was taken as evidence of a particularly strong influence of thermal fluctuations on the sample magnetization at temperatures still well below T c . 1,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20 However, we recently demonstrated that the fluctuation induced corrections to the magnetization remain negligibly small up to temperatures very close to T c , 21 thus suggesting a more general inadequacy of the model. While on previous occasions we could only speculate on the origin of the failure of the model, we are now able to show that most likely it is the insufficient accuracy in the calculation of M (H, κ) using the Hao-Clem model.…”