Journal
SOLID STATE SCIENCES
Volume 13, Issue 7, Pages 1396-1400Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2011.04.011
Keywords
Ca2IrO4 and K2NiF4-type structures; DFT; PAW GGA; Chemical bonding; Magnetism
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Deriving the energy-volume equation of state for Na2OsO4 in its actual Ca2IrO4-type structure at high pressure and in hypothetic K2NiF4-type, leads to energy destabilization at a larger volume for the latter and to propose the former as a post-K2NiF4 through which a tuning of the magnetism and conductivity can be achieved: while the oxide system is magnetically silent in Ca2IrO4-type due to spin pairing (S = 0 for d(2) Os6+) with a semi-conducting behavior, a finite moment develops in the latter when spin polarization is accounted for (S = 1). (C) 2011 Elsevier Masson SAS. All rights reserved.
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