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VOLUME 53 (1991) | ISSUE 12 | PAGE 614
Magnetication vs external magnetic field in layered superconductors
For an anisotropic layered superconductor we have calculated the magnetization ve absolute value é and orientation of the external magnetic field. It displays a cusp at a field Μ = Χι(θ), where θ is the angle between the field and the layers, and a maximum at some characteristic field X = #s(0) α (sini)-1 in agreement with the experimental meaeurments by Zavaritsky N.V. and Zavaritsky V.N. We predict the existence of an intermediate critical field Μ = Μ3{θ) ÏÓ (sinfl)-1 at which the perpendicular to the layers component of the magnetic induction first penetrates the sample. The magnetic susceptibility χ = Äí/Äè has a jump at N = The jump is very small at × > 7_1, where 7 is the anisotropy coefficient. In this range of angles one can observe a cusp on a graph of χ vs )( at ë = U^This prediction of theory is in good agreement with the experiment a.