Comment on "Enhanced two-dimensional properties of the four-layered cuprate high-Tc superconductor TlBa-2Ca-3Cu-4O-y"

Abstract

We reanalyze published magnetization data and demonstrate that the conclusion of the original authors, claiming enhanced two-dimensional properties of the cuprate superconductor Tl-1234, is not supported by the experimental results. Our analysis shows that the magnetic field dependence of the mixed-state magnetization for this particular sample is amazingly close to the results of numerical calculations by E. H. Brandt for an ideal vortex lattice without fluctuations. This good agreement between experiment and theory allows for the evaluation of the absolute values of the upper critical field.

References in corpus (6)

• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data. Application to high temperature superconductors
• Temperature dependence of the upper critical field of high-Tc superconductors from isothermal magnetization data. Application to polycrystalline samples and ceramics
• On the interpretation of the equilibrium magnetization in the mixed state of high-Tc superconductors
• On the equilibrium magnetization of high-Tc superconductors below the irreversibility line
• Pinning Action of Correlated Disorder against Equilibrium Properties of HgBa${}_2$Ca${}_2$Cu${}_3$O${}_x$: a Delicate Balance

Cited by in corpus (3)

• Vanishing of the upper critical field in Bi_2Sr_2CaCu_2O_{8+δ} from Landau-Ott scaling
• Temperature dependences of the upper critical field and the Ginzburg-Landau parameter of Li2Pd3B from magnetization measurements
• Two types of Hc2(T) dependences in Bi_2Sr_2Ca_(1-x)Y_xCu_2O_(8+delta) with different Yttrium content