Relaxation dynamics, phase pattern in the vicinity of the Curie temperature, Fe valent state and the Mössbauer effect in PFN ceramics

Relaxation dynamics, phase pattern in the vicinity of the Curie temperature, Fe valent state and the Mössbauer effect in PFN ceramics

High-density lead ferroniobate, PbFe1/2Nb1/2O3 (PFN), was prepared by the conventional ceramic technology. Its dielectric properties, phase pattern in the vicinity of transition into the polar phase, and the x-ray electron and Mössbauer spectra were studied. The relaxation dynamics discovered at the...

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Veröffentlicht in:Ceramics international 2012-12, Vol.38 (8), p.6157-6161
Hauptverfasser: Pavlenko, A.V., Kozakov, A.T., Kubrin, S.P., Pavelko, A.A., Guglev, K.A., Shilkina, L.A., Verbenko, I.A., Sarichev, D.A., Reznichenko, L.A.
Format: Artikel
Sprache:eng
Schlagworte:
B. Spectroscopy
C. Ferroelectric properties
Ceramics
Curie temperature
D. Ferrites
Dynamics
Ferroelectric materials
Iron
Mossbauer effect
Mössbauer effect
Phase transformations
Spectra
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Zusammenfassung:High-density lead ferroniobate, PbFe1/2Nb1/2O3 (PFN), was prepared by the conventional ceramic technology. Its dielectric properties, phase pattern in the vicinity of transition into the polar phase, and the x-ray electron and Mössbauer spectra were studied. The relaxation dynamics discovered at the temperature exceeding the Curie temperature at the frequencies of 3×10−2–105Hz is described in detail. Near TC, the following sequence of phase transitions was established: rhombohedral (T
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2012.04.066