Cation ordering, ferrimagnetism and ferroelectric relaxor behavior in Pb(Fe1−xScx)2∕3W1∕3O3 solid solutions★
Center of Materials Science, Karpov Institute of Physical Chemistry,
Vorontsovo Pole, 10,
2 Department of Engineering Sciences, Uppsala University, Box 534, 751 21 Uppsala, Sweden
3 Nuclear Physics Institute, CAS, Rez, Czech Republic
4 Moscow Technological University, Moscow 119454, Russia
5 Department of Chemistry, Ångstrom Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden
6 Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden
a e-mail: email@example.com
Received in final form: 25 May 2019
Published online: 1 August 2019
Ceramic samples of the multiferroic perovskite Pb(Fe1−xScx)2∕3W1∕3O3 with 0 ≤ x ≤ 0.4 have been synthesized using a conventional solid-state reaction method, and investigated experimentally and theoretically using first-principle calculations. Rietveld analyses of joint synchrotron X-ray and neutron diffraction patterns show the formation of a pure crystalline phase with cubic (Fm3̅m) structure with partial ordering in the B-sites. The replacement of Fe by Sc leads to the increase of the cation order between the B′ and B′′ sites. As the non-magnetic Sc3+ ions replace the magnetic Fe3+ cations, the antiferromagnetic state of PbFe2∕3W1∕3O3 is turned into a ferrimagnetic state reflecting the different magnitude of the magnetic moments on the B′ and B′′ sites. The materials remain ferroelectric relaxors with increasing Sc content. Results from experiments on annealed and quenched samples show that the cooling rate after high temperature annealing controls the degree of cationic order in Pb(Fe1−xScx)2∕3W1∕3O3 and possibly also in the undoped PbFe2∕3W1∕3O3.
Key words: Solid State and Materials
Supplementary material in the form of one pdf file available from the Journal web page at https://doi.org/10.1140/epjb/e2019-100149-9
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