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  Non-collinear Order and Spin-Orbit Coupling in Sr3ZnIrO6

McClarty, P. A., Hillier, A. D., Adroja, D. T., Khalyavin, D. D., Rayaprol, S., Manuel, P., et al. (2020). Non-collinear Order and Spin-Orbit Coupling in Sr3ZnIrO6. Journal of the Physical Society of Japan, 89(6): 064703. doi:10.7566/JPSJ.89.064703.

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 Urheber:
McClarty, Paul A.1, Autor           
Hillier, Adrian D.2, Autor
Adroja, Devashibhai T.2, Autor
Khalyavin, Dmitry D.2, Autor
Rayaprol, Sudhindra2, Autor
Manuel, Pascal2, Autor
Kockelmann, Winfried2, Autor
Sampathkumaran V, Echur2, Autor
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2external, ou_persistent22              

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 MPIPKS: Superconductivity and magnetism
 Zusammenfassung: Sr3ZnIrO6 is an effective spin one-half Mott insulating iridate belonging to a family of magnets which includes a number of quasi-one dimensional systems as well as materials exhibiting three dimensional order. Here we present the results of an extensive investigation into the magnetism including heat capacity, a.c. susceptibility, muon spin rotation (mu SR), neutron diffraction and inelastic neutron scattering on the same sample. It is established that the material exhibits a transition at about 17 K into a three-dimensional antiferromagnetic structure with propagation vector k = (0, 1/2, 1) in the hexagonal setting of R (3) over barc and non-collinear moments of 0.87 mu B on Ir4+ ions. Further we have observed a well defined powder averaged spin wave spectrum with zone boundary energy of similar to 5 meV at 5 K. We stress that a theoretical analysis shows that the observed non-collinear magnetic structure arises from anisotropic inter- and intra-chain exchange which has its origin in significant spin orbit coupling. The model can satisfactorily explain the observed magnetic structure and spin wave excitations.

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 Datum: 2020-05-072020-06-15
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 000537748100020
DOI: 10.7566/JPSJ.89.064703
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Titel: Journal of the Physical Society of Japan
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Tokyo : The Society
Seiten: - Band / Heft: 89 (6) Artikelnummer: 064703 Start- / Endseite: - Identifikator: ISSN: 0031-9015
CoNE: https://pure.mpg.de/cone/journals/resource/954925433407