Reversible magnetization of the two-band MgB2 superconductor: A phenomenological approach

M. Eisterer; M. Zehetmayer; H. W. Weber; J. Karpinski

doi:10.1103/PhysRevB.72.134525

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Reversible magnetization of the two-band MgB2 superconductor: A phenomenological approach

M. Eisterer, M. Zehetmayer, H. W. Weber, J. Karpinski

DOI 10.1103/PhysRevB.72.134525 · Physical Review B

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Abstract

A phenomenological theory of the reversible magnetization of MgB2 is presented and compared to experimental data. It is based on Ginzburg-Landau theory, but introduces magnetic field-dependent parameters. This field dependence is a natural consequence of the two band nature of MgB2 and accounts for the varying contribution of the π band. The model describes the experimental data with one (field-dependent) anisotropy parameter for the penetration depth and for the coherence length.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38.1	Pressure not reported	unknown