Role of dipole-dipole interaction on the magnetic dynamics of anisotropic layered cuprate antiferromagnets

In the present paper, we report the role of dipole-dipole interaction on th e magnetic dynamics of single layer antiferromagnets. For this, the model H amiltonian includes the exchange Heisenberg Hamiltonian as well as dipole-d ipole interactions. Within the linear spin-wave theory, we employ the doubl e time Green's function technique to obtain expressions for the spin wave d ispersion, sublattice magnetization and the magnetic contribution to specif ic heat as a function of various parameters of the model Hamiltonian. We ob serve through numerical calculations that in the absence of anisotropy in e xchange couplings the dipole-dipole interaction works as an anisotropy and sustains the magnetization even in a pure 2D system.