Origin of Magnetism and trend in Tc in Cr-based double perovskites: Interplay of two driving mechanisms
Abstract
Employing first principles density functional calculations, together with solution of the low-energy, model Hamiltonian constructed in a first principles manner, we explored the origin of magnetism and Tc trend in Cr-based double perovskite series, Sr2CrB'O6 (B'=W/Re/Os). Our study shows that the apparently puzzling Tc trend in Sr2CrB'O6 (B'=W/Re/Os) series can be understood in terms of the interplay of the hybridization driven mechanism and the super-exchange mechanism.
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