Yan Binghai
Lattice-Site-Specific Spin Dynamics in Double Perovskite Sr2CoOsO6
Binghai, Yan; Paul, Avijit Kumar; Kanungo, Sudipta; Reehuis, Manfred; Hoser, Andreas; Többens, Daniel M.; Schnelle, Walter; Williams, Robert C.; Lancaster, Tom; Xiao, Fan; Möller, Johannes S.; Blundell, Stephen J.; Hayes, William; Felser, Claudia; Jansen, Martin
Authors
Avijit Kumar Paul
Sudipta Kanungo
Manfred Reehuis
Andreas Hoser
Daniel M. Többens
Walter Schnelle
Robert C. Williams
Professor Tom Lancaster tom.lancaster@durham.ac.uk
Professor
Fan Xiao
Johannes S. Möller
Stephen J. Blundell
William Hayes
Claudia Felser
Martin Jansen
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 TN1=108 K, cobalt (3d7, S=3/2) and osmium (5d2, S=1) moments fluctuate dynamically, while their average effective moments undergo long-range order. In the second AFM phase below TN2=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≈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.
Citation
Binghai, Y., Paul, A. K., Kanungo, S., Reehuis, M., Hoser, A., Többens, D. M., …Jansen, M. (2014). Lattice-Site-Specific Spin Dynamics in Double Perovskite Sr2CoOsO6. Physical Review Letters, 112(14), Article 147202. https://doi.org/10.1103/physrevlett.112.147202
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 24, 2014 |
Online Publication Date | Apr 10, 2014 |
Publication Date | Apr 10, 2014 |
Deposit Date | May 2, 2014 |
Publicly Available Date | May 13, 2014 |
Journal | Physical Review Letters |
Print ISSN | 0031-9007 |
Electronic ISSN | 1079-7114 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 112 |
Issue | 14 |
Article Number | 147202 |
DOI | https://doi.org/10.1103/physrevlett.112.147202 |
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Copyright Statement
Reprinted with permission from the American Physical Society: Binghai Yan, Avijit Kumar Paul, Sudipta Kanungo, Manfred Reehuis, Andreas Hoser, Daniel M. Többens, Walter Schnelle, Robert C. Williams, Tom Lancaster, Fan Xiao, Johannes S. Möller, Stephen J. Blundell, William Hayes, Claudia Felser, and Martin Jansen, Physical Review Letters, 112, 147202, 2014. © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
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