Spin wave excitations in the tetragonal double perovskite Sr2CuWO6

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Walker, H. C.
dc.contributor.author Mustonen, O.
dc.contributor.author Vasala, S.
dc.contributor.author Voneshen, D. J.
dc.contributor.author Le, M. D.
dc.contributor.author Adroja, D. T.
dc.contributor.author Karppinen, M.
dc.date.accessioned 2017-10-15T20:41:55Z
dc.date.available 2017-10-15T20:41:55Z
dc.date.issued 2016-08-09
dc.identifier.citation Walker , H C , Mustonen , O , Vasala , S , Voneshen , D J , Le , M D , Adroja , D T & Karppinen , M 2016 , ' Spin wave excitations in the tetragonal double perovskite Sr2CuWO6 ' PHYSICAL REVIEW B , vol 94 , no. 6 , 064411 , pp. 1-8 . DOI: 10.1103/PhysRevB.94.064411 en
dc.identifier.issn 1098-0121
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: aafd9091-1812-455a-b637-4058227c3570
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/spin-wave-excitations-in-the-tetragonal-double-perovskite-sr2cuwo6(aafd9091-1812-455a-b637-4058227c3570).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=84980693658&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/14779561/PhysRevB.94.064411.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/28270
dc.description.abstract Sr2CuWO6 is a double perovskite proposed to be at the border between two- and three-dimensional magnetism, with a square lattice of S=12Cu2+ ions. We have used inelastic neutron scattering to investigate the spin wave excitations of the system, to find out how they evolve as a function of temperature, as well as to obtain information about the magnetic exchange interactions. We observed well defined dispersive spin wave modes at 6 K, which partially survive above the magnetic ordering temperature TN=24 K. Linear spin wave theory is used to determine the exchange interactions revealing them to be highly two dimensional in nature. Density functional theory calculations are presented supporting this experimental finding, which is in contrast to a previous ab initio study of the magnetic interactions. Our analysis confirms that not the nearest neighbor, but the next nearest neighbor interactions in the tetragonal ab plane are the strongest. Low incident energy measurements reveal the opening of a 0.6(1) meV gap below TN, which suggests the presence of a very weak single ion anisotropy term in the form of an easy axis along â. en
dc.format.extent 1-8
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW B en
dc.relation.ispartofseries Volume 94, issue 6 en
dc.rights openAccess en
dc.subject.other Condensed Matter Physics en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other 216 Materials engineering en
dc.title Spin wave excitations in the tetragonal double perovskite Sr2CuWO6 en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Rutherford Appleton Laboratory
dc.contributor.department Department of Chemistry
dc.contributor.department University of Johannesburg
dc.subject.keyword Condensed Matter Physics
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201710157130
dc.identifier.doi 10.1103/PhysRevB.94.064411
dc.type.version publishedVersion

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