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    Wyświetlanie 1-7 z 7
    Tytuł:
    Hyperfine interactions in x-Bi0.95Dy0.05FeO3-(1-x)-Pb(Fe2/3W1/3)O3 multiferroics
    Autorzy:
    Zachariasz, P.
    Stoch, A.
    Stoch, P.
    Maurin, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147354.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    multiferroics
    multifunctional materials
    Néel temperature
    Opis:
    The complex perovskite system xźBi0.95Dy0.05FeO3-(1 - x)źPb(Fe2/3W1/3)O3 was synthesized by the solid-state reaction method and was studied by means of Mössbauer spectroscopy. For different Dy-doped bismuth ferrite (BDF) contents (x = 0.1, 0.3, 0.5, 0.7) the formation of single-phase sinters was confirmed using an X-ray diffraction technique. The random distributions of Fe/W cations in crystallographic structures have been proved. A monotonically, saturation- like increase of Néel temperatures with growing BDF contribution was confirmed, and a straightforward dependence between TN temperatures and the mean hyperfine magnetic fields at Fe nuclei was shown.
    Źródło:
    Nukleonika; 2013, 58, 1; 53-56
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystal structure and Mössbauer effect in multiferroic 0.5BiFeO3-0.5Pb(Fe0.5Ta0.5)O3 solid solution
    Autorzy:
    Stoch, A.
    Maurin, J.
    Stoch, P.
    Kulawik, J.
    Szwagierczak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/146870.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    BiFeO3
    crystal structure
    hyperfine interactions
    multiferroics
    solid solution
    Opis:
    Multiferroic 0.5BiFeO3-0.5Pb(Fe0.5Ta0.5)O3 solid solution is a material that exhibits ferroelectric and antiferromagnetic orderings in ambient temperature. The solid solution was obtained as a result of a conventional reaction in a solid state. The obtained material is a dense, fine-grained sinter whose surface was observed by scanning electron microscopy (SEM) and stoichiometry was confirmed by energy dispersive X-ray spectroscopic (EDS) analysis. According to the X-ray powder diffraction (XRD) measurements, the main phase is R3c space group with admixture of Pm-3m regular phase. Small contribution of pyrochlore-like phase was also observed. Mössbauer spectroscopy suggested random distribution of Fe3+/Ta5+ cations in the B sites of ABO3 compound. Reduction of the magnetic hyperfine field with an increase in the substitution of Ta5+ in Fe3+ neighbourhood was also observed.
    Źródło:
    Nukleonika; 2017, 62, 2; 177-181
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Mössbauer Effect Studies of $0.5Bi_{0.95}Dy_{0.05}FeO_{3}-$$0.5Pb(Fe_{2//3}W_{1//3})O_{3}$ Multiferroic
    Autorzy:
    Stoch, A.
    Zachariasz, P.
    Stoch, P.
    Kulawik, J.
    Maurin, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506596.pdf
    Data publikacji:
    2011-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    61.66.Fn
    75.50.Ee
    77.84.Lf
    Opis:
    A polycrystalline ceramic of $0.5Bi_{0.95}Dy_{0.05}FeO_{3}-$ $0.5Pb(Fe_{2//3}W_{1//3})O_{3}$ was synthesized from a solid-state reaction method. At room temperature material exhibits both magnetic and electric dipolar properties simultaneously. Detailed X-ray diffraction analysis and Mössbauer effect studies have been done to determine the crystallographic structure and magnetic properties of $0.5Bi_{0.95}Dy_{0.05}FeO_{3}-$ $0.5Pb(Fe_{2//3}W_{1//3})O_{3}$. $T_{N}$ temperature was estimated at around 600 K.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 1; 59-61
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural, Electrical and Mössbauer Effect Studies of 0.5Bi $rm_{0.95}Dy_{0.05}FeO_3-0.5Pb(Fe_{0.5}Nb_{0.5})O_3$ Multiferroics
    Autorzy:
    Stoch, A.
    Kulawik, J.
    Stoch, P.
    Maurin, J.
    Zachariasz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811599.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    76.80.+y
    77.22.-d
    Opis:
    $0.5Bi_{0.95}Dy_{0.05}FeO_3-0.5Pb(Fe_{0.5}Nb_{0.5})O_3$ is a multiferroic material which exhibits ferroelectric and antiferromagnetic ordering. (The synthesis of such compounds is rather difficult.) In this paper the way of the synthesis of $0.5Bi_{0.95}Dy_{0.05}FeO_3-0.5Pb(Fe_{0.5}Nb_{0.5})O_3$ is presented. The detailed X-ray and Mössbauer effect studies were done and crystal and hyperfine interaction parameters were obtained. To measure electrical properties of the compound the impedance spectroscopy measurements were performed. The obtained impedance spectra were fitted using a proposed equivalent electrical circuit and the results were discussed in the scope of the brick layer model without easy paths.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6; 1585-1590
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoelectric Properties of $0.3Bi_{0.95}Dy_{0.05}FeO_3-0.7Pb(Fe_{2//3}W_{1//3})O_3$ Multiferroic
    Autorzy:
    Stoch, A.
    Stoch, P.
    Kulawik, J.
    Zieliński, P.
    Maurin, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490931.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.85.+t
    77.22.-d
    77.55.Nv
    77.80.-e
    77.80.Jk
    Opis:
    Pb-based complex perovskites with $Fe^{3+}$ like $Pb(Fe_{2//3}W_{1//3})O_3$ were found to be interesting because of their unique properties such as relaxor and magnetoelectric behavior. $Pb(Fe_{2//3}W_{1//3})O_3$ is ferroelectric with ferroelectric Curie temperature $T_{C}$ between 150 and 200 K and at the same time is antiferromagnetic with magnetic Néel temperature about 400 K. $BiFeO_3$ is a well known perovskite compound which exhibits ferroelectric ($T_{C}$ = 1103 K) and antiferromagnetic ($T_{N}$ = 643 K) ordering simultaneously. The polycrystalline sample of $0.3Bi_{0.95}Dy_{0.05}FeO_3-0.7Pb(Fe_{2//3}W_{1//3})O_3$ were synthesized using standard sintering procedure. Magnetization vs. magnetic field (at 4.2 K) curves were measured. Magnetoelectric properties of the sample were obtained.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 128-130
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Mössbauer Effect Studies of $0.7Bi_{0.95}Dy_{0.05}FeO_3-$$0.3Pb(Fe_{0.5}Nb_{0.5})O_3$ Multiferroic
    Autorzy:
    Stoch, A.
    Kulawik, J.
    Stoch, P.
    Maurin, J.
    Zachariasz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506595.pdf
    Data publikacji:
    2011-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    61.66.Fn
    75.50.Ee
    76.08.+y
    77.84.Lf
    Opis:
    $0.7Bi_{0.95}Dy_{0.05}FeO_{3}-$ $0.3Pb(Fe_{0.5}Nb_{0.5})O_{3}$ is a multiferroic material which exhibits ferroelectric and antiferromagnetic ordering. In this paper the way of the synthesis of $0.7Bi_{0.95}Dy_{0.05}FeO_{3}-$ $0.3Pb(Fe_{0.5}Nb_{0.5})O_{3}$ is presented. The detailed X-ray and Mössbauer effect studies were done and crystal and hyperfine interaction parameters were obtained.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 1; 56-58
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for production of nanoMOF and prelimiary characterization by selected analytical techniques
    Autorzy:
    Starosta, W.
    Sartowska, B.
    Łyczko, K.
    Maurin, J.
    Pawlukojć, A.
    Waliś, L.
    Buczkowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146902.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    HKUST-1
    metal-organic frameworks (MOFs)
    solvothermal method
    template synthesis
    Opis:
    Metal-organic frameworks (MOFs) are a class of porous hybrid materials comprising metal ion-based vertices and multitopic organic ligands (linkers). The possibility of combining a wide range of metals with similarly large number of available ligands opens ways to design the structures meeting specific purposes. At present, many potential applications of MOFs may require them to be constructed at the nanometer length scale (nanoMOFs). The possibility of filling the track-etched membrane pores with MOF HKUST-1 has been demonstrated in this work.
    Źródło:
    Nukleonika; 2012, 57, 4; 581-583
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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