V. G. Kogan

Theory of the Magnetization of Granular Superconductors: Application to High-Tc Superconductors

We calculate the dc magnetization of a three-dimensional array of weakly Josephson-coupled superconducting grains whose dimensions are of the order of the intragranular weak-field penetration depth. Because of significant flux penetration into small grains, the initial slope of the magnetization versus applied field not only is smaller than that for very large grains of the same shape, but also decreases with increasing temperature and vanishes at the critical temperature. The same behavior is expected for the ac susceptibility versus increasing temperature in a sample cooled in zero field. The dc magnetization is found to exhibit a corresponding size-dependent suppression for all fields up to the upper critical field.

Determination of superconducting anisotropy from magnetization data on random powders as applied to LuNi 2 B 2 C , YNi 2 B 2 C , and MgB 2

The recently discovered intermetallic superconductor

Anisotropy of the Upper Critical Field in Superconductors with Anisotropic Gaps: Anisotropy Parameters of MgB2

{\mathrm{MgB}}_{2}

Vortex-assisted photon counts and their magnetic field dependence in single-photon superconducting detectors

appears to have a highly anisotopic upper critical field with

Nonexponential London penetration depth of FeAs-based superconducting RFeAsO(0.9)F(0.1) (R = La, Nd) single crystals.

{H}_{c2}^{\mathrm{max}}{/H}_{c2}^{\mathrm{min}}\ensuremath{\equiv}\ensuremath{\gamma}g5.

Is the term "type-1.5 superconductivity" warranted by Ginzburg-Landau theory?

In order to determine the temperature dependence of both

Anisotropy parameters of superconducting MgB2

{H}_{c2}^{\mathrm{max}}

Anisotropy Effects upon the Magnetic Properties of High-Tc Superconductors

and

Temperature Dependence of the Flux Line Lattice Transition into Square Symmetry in Superconducting LuNi2B2C

{H}_{c2}^{\mathrm{min}}

Effects of La Substitution on the Superconducting State of CeCoIn5

we propose a method of extracting the superconducting anisotropy from the magnetization