Riemannian scalar curvature diagrams for some pure andmixed-spin Ising chains

One-dimensional spin-1/2 Ising, spin-1 Blume-Capel and mixed-spin Ising models in the long itudinal magnetic field have been investigated with in the frame work of Ri- emannian geometry. Firstly, exact solutions of each chain using transfer matri xmethod and Gibbs free energy relation(G) are given. The metric tensor elements are obtained with the help of G and using their partial derivatives the curvature scalar(R) is derived. Results are presented as three-dimensional R - diagrams