Abstract
By taking into account the results of recent studies of (${\mathrm{Zn}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Mn}}_{\mathit{x}}$${)}_{3}$${\mathrm{As}}_{2}$ (ZMA), which is an example of a II-V diluted magnetic semiconductor (DMS) with a very complicated tetragonal crystal structure, we have generalized the pair-approximation model, widely used to analyze the magnetic behavior of II-VI DMS's, for an arbitrary structure. We have subsequently applied our model, which may be called the generalized pair approximation, to reinterpreting the results of magnetic measurements obtained for ZMA. Based on theoretical works that treat the Mn-Mn interaction in DMS's as a sum of superexchange and the Bloembergen-Rowland (BR) mechanism, we have been able to obtain satisfactory agreement between our approach and experiment by introducing only two adjustable parameters, in spite of the complexity of the crystal structure of ZMA. These parameters are the first nearest-neighbor exchange constants for both mechanisms and they have been found to be equal to -53 and -11 K for superexchange and the BR exchange, respectively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.