Abstract
AbstractThe application of the elementary excitation theory to the spin system of a ferromagnetic is investigated on the basis of the Heisenberg model. It is found that the spectrum of elementary excitations considered as a gas of quasi‐particles, and their distribution function are completely determined by the Hamiltonian of the system. The spectrum of the transverse spin waves and the distribution function both of the transverse and the longitudinal spin waves are calculated by the double‐time anticommutator Green's function method. Since the distribution functions have no singularities, it is possible to obtain expressions for the thermodynamic quantities in the form of convergent power series in a small parameter τ T/Tc. Expressions for the specific heat and the spontaneous magnetization of a ferromagnetic are calculated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
