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  Lattice-Site-Specific Spin Dynamics in Double Perovskite Sr2CoOsO6

Yan, B., Paul, A. K., Kanungo, S., Reehuis, M., Hoser, A., Toebbens, D. M., et al. (2014). Lattice-Site-Specific Spin Dynamics in Double Perovskite Sr2CoOsO6. Physical Review Letters, 112(14): 147202, pp. 1-6. doi:10.1103/PhysRevLett.112.147202.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-079F-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-5168-7
Genre: Journal Article

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 Creators:
Yan, Binghai1, Author              
Paul, Avijit Kumar2, Author              
Kanungo, Sudipta3, Author
Reehuis, Manfred3, Author
Hoser, Andreas3, Author
Toebbens, Daniel M.3, Author
Schnelle, Walter4, Author              
Williams, Robert C.3, Author
Lancaster, Tom3, Author
Xiao, Fan3, Author
Moeller, Johannes S.3, Author
Blundell, Stephen J.3, Author
Hayes, William3, Author
Felser, Claudia5, Author              
Jansen, Martin6, Author              
Affiliations:
1Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
3external, ou_persistent22              
4Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
6Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: Magnetic properties and spin dynamics have been studied for the structurally ordered double perovskite Sr2CoOsO6. Neutron diffraction, muon-spin relaxation, and ac-susceptibility measurements reveal two antiferromagnetic (AFM) phases on cooling from room temperature down to 2 K. In the first AFM phase, with transition temperature T-N1 = 108 K, cobalt (3d(7), S = 3/2) and osmium (5d(2), S = 1) moments fluctuate dynamically, while their average effective moments undergo long-range order. In the second AFM phase below T-N2 = 67 K, cobalt moments first become frozen and induce a noncollinear spin-canted AFM state, while dynamically fluctuating osmium moments are later frozen into a randomly canted state at T approximate to 5 K. Ab initio calculations indicate that the effective exchange coupling between cobalt and osmium sites is rather weak, so that cobalt and osmium sublattices exhibit different ground states and spin dynamics, making Sr2CoOsO6 distinct from previously reported double-perovskite compounds.

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 Dates: 2014-04-10
 Publication Status: Published in print
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 112 (14) Sequence Number: 147202 Start / End Page: 1 - 6 Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1