The Crystal Structure and Magnetic Behavior of Quinary Osmate and Ruthenate Double Perovskites La ABB'O6 ( A = Ca, Sr; B = Co, Ni; B' = Ru, Os)

Inorganic Chemistry
Ryan MorrowPatrick M Woodward

Abstract

Six La ABB'O6( A = Ca, Sr; B = Co, Ni; B' = Ru, Os) double perovskites were synthesized, several for the first time, and their crystal structures and magnetic behavior were characterized with neutron powder diffraction and direct-current and alternating-current magnetometry. All six compounds crystallize with P21/n space group symmetry, resulting from a-a-c+octahedral tilting and complete rock salt ordering of transition-metal ions. Despite the electronic configurations of the transition-metal ions, either d8-d3or d7-d3, not one of the six compounds shows ferromagnetism as predicted by the Goodenough-Kanamori rules. LaSrNiOsO6, LaSrNiRuO6, and LaCaNiRuO6display long-range antiferromagnetic order, while LaCaNiOsO6, LaCaCoOsO6, and LaSrCoOsO6exhibit spin-glass behavior. These compounds are compared to the previously studied LaCaCoRuO6and LaSrCoRuO6, both of which order antiferromagnetically. The observed variations in magnetic properties can be attributed largely to the response of competing superexchange pathways due to changes in B-O- B' bond angles, differences in the radial extent of the 4d ( B' = Ru) and 5d ( B' = Os) orbitals, and filling of the t2gorbitals of the 3d ion.

References

Dec 1, 1988·Physical Review. B, Condensed Matter·M S Seehra, T M Giebultowicz
Jun 16, 2005·Journal of the American Chemical Society·Masaki AzumaMikio Takano
May 20, 2006·Acta Crystallographica. Section B, Structural Science·Paris W BarnesPatrick M Woodward
May 20, 2006·Acta Crystallographica. Section B, Structural Science·Michael W LufasoPatrick M Woodward
Nov 5, 2013·Physical Review Letters·Avijit Kumar PaulClaudia Felser
Nov 20, 2013·Journal of the American Chemical Society·Ryan MorrowPatrick M Woodward
Feb 21, 2014·Journal of the American Chemical Society·Hai L FengKazunari Yamaura
Apr 29, 2014·Physical Review Letters·Binghai YanMartin Jansen
Jul 16, 2014·Inorganic Chemistry·Ryan MorrowPatrick M Woodward
Mar 6, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Corey M ThompsonJohn E Greedan
Aug 31, 2016·Scientific Reports·Ryan MorrowPatrick M Woodward

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