Statistical mechanics of a one-dimensional ferromagnetic chain with an impurity under an external field
Phys. Rev. B 49, 647 – Published 1 January, 1994
DOI: https://doi.org/10.1103/PhysRevB.49.647
Abstract
An exact solution for the statistical mechanics of a one-dimensional ferromagnetic chain with an impurity under an external magnetic field is obtained by the transfer-matrix method and the results are compared with that of a pure chain without an impurity. Expressions for the free energy and susceptibility are obtained in closed form. The mechanisms of the change of phase variation of the wave vector and correlation length are demonstrated graphically.