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Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1-xCaxNiReO6
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India;Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Re, Albert Einstein Str 15, D-12489 Berlin, Germany.
Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata, India.ORCID iD: 0000-0003-3277-0096
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Seagate Technol, 1 Disc Dr, Springtown BT48 0BF, North Ireland.
KTH Royal Inst Technol, Dept Appl Phys, SE-16440 Stockholm, Kista, Sweden.
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 18296Article in journal (Refereed) Published
Abstract [en]

The magnetic ground states in highly ordered double perovskites LaSr1-xCaxNiReO6 (x = 0.0, 0.5, 1.0) are studied in view of the Goodenough-Kanamori rules of superexchange interactions in this paper. In LaSrNiReO6, Ni and Re sublattices are found to exhibit curious magnetic states separately, but no long range magnetic ordering is achieved. The magnetic transition at similar to 255 K is identified with the independent Re sublattice magnetic ordering. Interestingly, the sublattice interactions are tuned by modifying the Ni-O-Re bond angles through Ca doping. Upon Ca doping, the Ni and Re sublattices start to display a ferrimagnetically ordered state at low temperature. The neutron powder diffraction data reveals long range ferrimagnetic ordering of the Ni and Re magnetic sublattices along the crystallographic b-axis. The transition temperature of the ferrimagnetic phase increases monotonically with increasing Ca concentration.

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NATURE PUBLISHING GROUP , 2019. Vol. 9, article id 18296
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Physical Chemistry
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URN: urn:nbn:se:uu:diva-400665DOI: 10.1038/s41598-019-54427-0ISI: 000501437300001PubMedID: 31797876OAI: oai:DiVA.org:uu-400665DiVA, id: diva2:1382427
Funder
Swedish Research Council, 2014-6426Swedish Research Council, 2016-04524Swedish Research Council, 2016-06955Swedish Research Council, 2017-05078Swedish Foundation for Strategic Research The Swedish Foundation for International Cooperation in Research and Higher Education (STINT)Available from: 2020-01-03 Created: 2020-01-03 Last updated: 2020-01-03Bibliographically approved

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