Abstract
In the present work the effective spin Hamiltonian in ${\mathrm{Pb}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Mn}}_{\mathit{xA}}$ (A=Te,Se,S) is obtained as a result of an indirect exchange between Mn atoms via band electrons and holes. The effective Hamiltonian and the exchange integrals are calculated for nonzero temperature using the finite-temperature Green-function approach. As a result, the effective Hamiltonian is expressed in a form of a rapidly convergent series. The first term of that series corresponds to the zero-temperature result, while other terms represent temperature corrections to it. A criterion of the validity of the zero-temperature Green-function approach in a finite temperature is proposed. \textcopyright{} 1996 The American Physical Society.
Sign-in/Register to access full text options 
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.
