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Magnetic properties of Ruddlesden-Popper phases Sr3−x Yx (Fe1.25 Ni0.75) O7−δ: A combined experimental and theoretical investigation
Uppsala University, Department of Physics and Astronomy, Division of Materials Theory, Uppsala, Sweden.
Uppsala University, Department of Engineering Sciences, Division of Solid State Physics, Uppsala, Sweden.
Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden; Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland; Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden.
Uppsala University, Department of Physics and Astronomy, Division of Materials Theory, Uppsala, Sweden.
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2018 (English)In: Physical Review Materials, E-ISSN 2475-9953, Vol. 2, no 4, article id 044005Article in journal (Refereed) Published
Abstract [en]

We present a comprehensive study of the magnetic properties of Sr3-xYx(Fe1.25Ni0.75)O-7(-delta )(0 <= x <= 0.75). Experimentally, the magnetic properties are investigated using superconducting quantum interference device (SQUID) magnetometry and neutron powder diffraction (NPD). This is complemented by a theoretical study based on density functional theory as well as the Heisenberg exchange parameters. Experimental results show an increase in the Ned temperature (T-N) with an increase of Y concentrations and O occupancy. The NPD data reveal that all samples are antiferromagnetically ordered at low temperatures, which has been confirmed by our theoretical simulations for the selected samples. Our first-principles calculations suggest that the three-dimensional magnetic order is stabilized due to finite interlayer exchange couplings. The latter give rise to finite interlayer spin-spin correlations, which disappear above T-N.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 2, no 4, article id 044005
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:oru:diva-66838DOI: 10.1103/PhysRevMaterials.2.044005ISI: 000430385300001OAI: oai:DiVA.org:oru-66838DiVA, id: diva2:1203151
Funder
Swedish Research Council
Note

Funding Agencies:

eSSENCE  

KAW Foundation 

Available from: 2018-05-02 Created: 2018-05-02 Last updated: 2018-05-02Bibliographically approved

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Eriksson, Olle

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