期刊
FERROELECTRICS
卷 391, 期 -, 页码 114-121出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00150190903001805
关键词
Lead iron niobate; PbFe1/2Nb1/2O3; multiferroics; X-ray photoelectron spectroscopy; dielectric properties; magnetic properties
X-ray photoelectron spectroscopy (XPS), magnetic and dielectric studies were performed for flux grown PbFe1/2Nb1/2O3 (PFN) single crystals. The core level XPS spectra show that the Pb, Nb and O ions exist in one valence state while Fe ions in two Fe2+ and Fe3+ states. Temperature dependences of magnetic susceptibility reveals maximum at 10 K (ZFC) and anomaly at T-N = 156 K related to AFM-PM transition. Dielectric and pyroelectric studies point to two ferroelectric phase transitions at 356 K and 376 K. The influence of appearance of the Fe2+ state on magnetic and semiconductor properties of PFN is discussed.
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