▎ 摘　　要

The magnetic properties of a quasi-two-dimensional (2D) superconductor, Sn-metal graphite (MG), are studied using DC and AC magnetic susceptibility. Sn-MG has a unique layered structure where Sn metal layer is sandwiched between adjacent graphene sheets. This compound undergoes a superconducting transition at T-c = 3.75 K at H = 0. The H-T diagram of Sn-MG is similar to that of a quasi-2D superconductors. The phase boundaries of vortex liquid, vortex glass, and vortex lattice phase merge into a multicritical point located at T-* = 3.4 K and H-* = 40 Oe. There are two irreversibility lines denoted by H-gl (de Almeida-Thouless type) and H-gl, (Gabay-Toulouse type), intersecting at T-0(') = 2.5 K and H-0(') = 160 Oe. The nature of slow dynamic and nonlinearity of the vortex glass phase is studied. (C) 2003 Elsevier B.V. All rights reserved.