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Origin of Magnetism and trend in $T_{c}$ in Cr-based double perovskites: Interplay of two driving mechanisms

Authors
  • Das, Hena
  • Sanyal, Prabuddha
  • Saha-Dasgupta, T.
  • Sarma, D. D.
Type
Preprint
Publication Date
Jan 24, 2011
Submission Date
Jan 24, 2011
Identifiers
DOI: 10.1103/PhysRevB.83.104418
Source
arXiv
License
Yellow
External links

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 $T_c$ trend in Cr-based double perovskite series, Sr$_2$CrB$'$O$_6$ (B$'$=W/Re/Os). Our study shows that the apparently puzzling $T_c$ trend in Sr$_2$CrB$'$O$_6$ (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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