Covalency a Pathway for Achieving High Magnetisation in $TMFe_2O_4$ Compounds

@article{Assadi2019CovalencyAP,
  title={Covalency a Pathway for Achieving High Magnetisation in \$TMFe\_2O\_4\$ Compounds},
  author={M. Assadi and H. katayama-Yoshida},
  journal={arXiv: Materials Science},
  year={2019}
}
The interplay between covalency and magnetism is non-trivial and can be harnessed for designing new functional magnetic materials. Based on a survey using density functional calculations, we show that $TM\unicode{x2013}O$ bond covalency can increase the total magnetic moment of spinel compounds of $TMFe_2O_4$ composition ($TM = V-Ni, Nb-Pd$) which are isomorphic to the much-researched magnetite. Accordingly, $PdFe_2O_4$ was found to exhibit the highest magnetic moment of 7.809 ${\mu}_B$ per… Expand
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Na site doping a pathway for enhanced thermoelectric performance in Na1-xCoO2; The case of Gd and Yb dopants.
  • Hussein Assadi
  • Physics, Medicine
  • Journal of physics. Condensed matter : an Institute of Physics journal
  • 2019
TLDR
It is demonstrated that in an oxygen poor environment, Gd and Yb dopants reside in the Na layer while in a oxygen rich environment these dopants replace a Co in CoO2 layer, demonstrating how thermoelectric performance critically depends on the synthesis environment that must be fine-tuned for achieving any thermoelectedric enhancement. Expand

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