JETP Letters: issues online

$For an anisotropic layered superconductor we have calculated the magnetization versus the absolute value Ж and orientation of the external magnetic field. The curve displays a cusp at a field Ж = Жх (θ), where θ is the angle between the field and the layers, and a maximum at a certain characteristic field Ж = Ж3 (θ) ос (sin θ) ~ 1, in agreement with the experimental measurements by Ν. V. Zavaritsky and V. N. Zavaritsky. We predict the existence of an intermediate critical field Ж = Ж2 (θ) <χ (sin θ) ~ ', at which the component of the magnetic induction perpendicular to the layers first penetrates the sample. The magnetic susceptibility j = дМ /дЖ has a jump ъХ,Ж = Ж2{9). The jump is very small at 6?> γ ~1, where ^is the anisotropy coefficient. In this range of angles one can observe a cusp on a graph of χ vs^at Ж = Ж2. This prediction of the theory is in good agreement with the experiment.2$

For an anisotropic layered superconductor we have calculated the magnetization versus the absolute value Ж and orientation of the external magnetic field. The curve displays a cusp at a field Ж = Ж_х (θ), where θ is the angle between the field and the layers, and a maximum at a certain characteristic field Ж = Ж₃ (θ) ос (sin θ) ~ ¹, in agreement with the experimental measurements by Ν. V. Zavaritsky and V. N. Zavaritsky. We predict the existence of an intermediate critical field Ж = Ж₂ (θ) <χ (sin θ) ~ ', at which the component of the magnetic induction perpendicular to the layers first penetrates the sample. The magnetic susceptibility j = дМ /дЖ has a jump ъХ,Ж = Ж₂{9). The jump is very small at 6?> γ ~¹, where ^is the anisotropy coefficient. In this range of angles one can observe a cusp on a graph of χ vs^at Ж = Ж₂. This prediction of the theory is in good agreement with the experiment.²