Lattice-site-specific spin dynamics in double perovskite sr2cooso6

Yan B, Paul AK, Kanungo S, Reehuis M, Hoser A, Toebbens DM, Schnelle W, Williams RC, Lancaster T, Xiao F, Moeller JS, Blundell SJ, Hayes W, Felser C, Jansen M (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Physical Review Letters American Physical Society

Book Volume: 112

Article Number: 147202

Journal Issue: 14

DOI: 10.1103/PhysRevLett.112.147202

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=108K, 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=67K, 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≈5K. 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. © 2014 American Physical Society.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Durham University GB United Kingdom (GB) University of Oxford GB United Kingdom (GB)

How to cite

APA:

Yan, B., Paul, A.K., Kanungo, S., Reehuis, M., Hoser, A., Toebbens, D.M.,... Jansen, M. (2014). Lattice-site-specific spin dynamics in double perovskite sr2cooso6. Physical Review Letters, 112(14). https://doi.org/10.1103/PhysRevLett.112.147202

MLA:

Yan, Binghai, et al. "Lattice-site-specific spin dynamics in double perovskite sr2cooso6." Physical Review Letters 112.14 (2014).

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