Independent Ordering of Two Interpenetrating Magnetic Sublattices in the Double Perovskite SrCoOsO.
The insulating, fully ordered, double perovskite SrCoOsO undergoes two magnetic phase transitions. The Os(VI) ions order antiferromagnetically with a propagation vector k = (1/2, 1/2, 0) below T = 108 K, while the high-spin Co(II) ions order antiferromagnetically with a propagation vector k = (1/2,...
| Publicado en: | Journal of the American Chemical Society Vol. 135; no. 50; pp. 18824 - 18831 |
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| Autores principales: | , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
12/18/2013
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=93405077&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 93405077 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 12/18/2013 vid: 135 iid: 50 pid: 997 pub: American Chemical Society artinfo: ui: 93405077 10.1021/ja407342w ppf: 18824 ppct: 7 formats: tig: atl: Independent Ordering of Two Interpenetrating Magnetic Sublattices in the Double Perovskite SrCoOsO. aug: au: Morrow, Ryan Mishra, Rohan Restrepo, Oscar D. Ball, Molly R. Windl, Wolfgang Wurmehl, Sabine Stockert, Ulrike Büchner, Bernd Woodward, Patrick M. affil: Department of Chemistry, Ohio State University, Columbus, Ohio 43210-1185, United States Department of Materials Science and Engineering, Ohio State University, Columbus, Ohio 43210-1117, United States Leibniz Institute for Solid State and Materials Research Dresden IFW, D-01171 Dresden, Germany Institute for Solid State physics, Technische Universität Dresden, D-01062 Dresden, Germany su: Magnetic properties of perovskite Magnetic transitions Antiferromagnetic materials Density functionals Exchange reaction kinetics sug: subj: Magnetic properties of perovskite Magnetic transitions Antiferromagnetic materials Density functionals Exchange reaction kinetics ab: The insulating, fully ordered, double perovskite SrCoOsO undergoes two magnetic phase transitions. The Os(VI) ions order antiferromagnetically with a propagation vector k = (1/2, 1/2, 0) below T = 108 K, while the high-spin Co(II) ions order antiferromagnetically with a propagation vector k = (1/2, 0, 1/2) below T = 70 K. Ordering of the Os(VI) spins is accompanied by a structural distortion from tetragonal I4/m symmetry to monoclinic I2/m symmetry, which reduces the frustration of the face centered cubic lattice of Os(VI) ions. Density functional theory calculations show that the long-range Os–O–Co–O–Os and Co–O–Os–O–Co superexchange interactions are considerably stronger than the shorter Os–O–Co interactions. The poor energetic overlap between the 3d orbitals of Co and the 5d orbitals of Os appears to be responsible for this unusual inversion in the strength of short and long-range superexchange interactions. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2013 holdings: @attributes: islocal: N |
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