Magnetic phase diagram, phase transitions, and cation distribution in Pb1-xBax(Fe0.5Nb0.5)O3 perovskites
Kmječ T. Adamec M. Kubániová D. Argymbek B. Plocek J. Dopita M. Cejpek P. Chlan V. Hraníček J. Kichanov S.E. Závěta K. Detlefs B. Cesnek M. Veverka M. Štěpánková H. Kohout J.
April 2022Elsevier Ltd
Materials Science and Engineering: B
2022#278
The 57Fe-enriched polycrystalline perovskite samples Pb1-xBax(Fe0.5Nb0.5)O3, x = 0.25, 0.5, 0.75 were prepared by a solid-state synthesis and studied in detail by X-ray powder diffraction (XRD), neutron diffraction, measurement of magnetic properties, Mössbauer spectroscopy (MoS), and nuclear magnetic resonance (NMR) in a wide temperature range. The temperature dependences of hyperfine, structural, and magnetic parameters were obtained, with particular attention to their values during magnetic and structural transitions. Relatively broad transitions to antiferromagnetically ordered state were observed in all samples. Néel temperatures TN were determined from the MoS spectra, the spin-glass transition was deduced from the characteristic behavior of the temperature dependences of ZFC/FC susceptibilities and remanent magnetization. Introduction of Ba into the structure gradually disrupts the long-range AFM order present in Pb(Fe0.5Nb0.5)O3, which leads to lowered TN and broadened transition. The magnetic phase diagram of Pb1−xBax(Fe0.5Nb0.5)O3 for the whole mixing interval Pb-Ba was obtained by combining the results of various methods.
Cation distribution , Hyperfine interactions , Magnetic phase diagram , Multiferroics , Perovskite , Spin glasses
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Charles University, Faculty of Mathematics and Physics, Ke Karlovu 3, 120 00 Prague 2, Czech Republic
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
The Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, Almaty, 050032, Kazakhstan
Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Rez 1001, Rez, 250 68, Czech Republic
Charles University, Faculty of Science, Department of Analytical Chemistry, Hlavova 8, 128 00 Prague 2, Czech Republic
Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10, 162 53 Prague 6, Czech Republic
European Synchrotron Radiation Facility ESRF, 71 Avenue des Martyrs, Grenoble, 38043, France
Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic
Charles University
Frank Laboratory of Neutron Physics
The Institute of Nuclear Physics
Institute of Inorganic Chemistry of the Czech Academy of Sciences
Charles University
Institute of Physics of the Czech Academy of Sciences
European Synchrotron Radiation Facility ESRF
Department of Nuclear Reactors
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