Controlling structural and magnetic properties of SrFe12O19 nanoplatelets by synthesis route and calcination time

Autor: Mathias Mørch, Matilde Saura-Múzquiz, Jakob Voldum Ahlburg, Mogens Christensen, Jennifer Hölscher, Didrik Konow Grønseth
Přispěvatelé: European Commission, Danish Center for Synchrotron and Neutron Science, Hoelscher, Jennifer [0000-0002-3242-0347], Saura-Múzquiz, Matilde [0000-0002-3572-7264], Ahlburg, Jakob [0000-0003-3215-3506], Mørch, Mathias [0000-0002-8022-5538], Christensen, Mogens [0000-0001-6805-1232], Hoelscher, Jennifer, Saura-Múzquiz, Matilde, Ahlburg, Jakob, Mørch, Mathias, Christensen, Mogens
Rok vydání: 2020
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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Hölscher, J, Saura-Múzquiz, M, Ahlburg, J, Mørch, M, Grønseth, D K & Christensen, M 2020, ' Controlling structural and magnetic properties of SrFe 12 O 19 nanoplatelets by synthesis route and calcination time ', Journal of Physics D: Applied Physics, vol. 53, no. 47, 474002 . https://doi.org/10.1088/1361-6463/abaae1
DOI: 10.1088/1361-6463/abaae1
Popis: [EN] Nanocrystalline platelets of Sr hexaferrite, SrFe12O19, were prepared by four techniques (two hydrothermal and two sol–gel techniques) and calcined at 1000 ◦C for 1, 2, 4, 8 and 16 h. The microstructure of these samples was analyzed using Rietveld refinements of high-resolution synchrotron powder x-ray diffraction data, and the obtained results were correlated with the magnetic properties obtained from vibrating sample magnetometer measurements. The calcination treatment causes the crystallites to preferentially grow along the c-axis, leading to more isotropic crystallites. Moreover, the microstructural changes induced by calcination alter the magnetic properties, yielding a higher saturation magnetization in all samples. The attained coercivity is correlated with the crystallite size along the width of the platelets. Despite the pronounced changes of the microstructure and the magnetic properties after calcination, the calcination duration has a minor effect on the properties, i.e. in most cases the steady state is obtained after 1 h. The starting material has a profound impact on the microstructural change during calcination, despite the high calcination temperature.
The authors gratefully acknowledge the financial support from the European Commission through the H2020 project AMPHIBIAN (H2020-NMBP-2016-720853) and the Danish Center for Synchrotron and Neutron Science (DanScatt).
Databáze: OpenAIRE
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