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Title: Luminescent-electrical-magnetic performances of sol-gel-derived Ni2+-modified Bi0.5Na0.5TiO3
Authors: Wu, X
Liu, CW
Tse, MY 
Lin, C
Zheng, XH
Lin, M 
Issue Date: 2017
Publisher: Springer
Source: Journal of materials science : materials in electronics, 2017, v. 28, no. 16, p. 12021-12025 How to cite?
Journal: Journal of materials science : materials in electronics 
Abstract: 2.5 mol% Ni2+-modified Bi0.5Na0.5TiO3 (BNT-Ni-0.025) ceramic has been fabricated based on the sol-gel method. The BNT-Ni-0.025 ceramic possesses a rhombohedral perovskite structure with denser microstructure than that of pure BNT ceramic. The introduction of certain amount of Ni2+ (e.g. 2.5 mol%) in BNT can reduce the sintering temperature (50 A degrees C lower), effectively suppress the grain growth, greatly decrease the dielectric loss and then produce multifunctionality. The BNT-Ni-0.025 ceramic also exhibits good ferroelectric properties with a large remanent polarization of similar to 26 mu C/cm(2). The observed weak ferromagnetism of the ceramic can be ascribed to the exchange interaction between free carriers (oxygen vacancy induced delocalized electrons) and the localized Ni2+ ions. Under the excitation of 370 nm, the BNT-Ni-0.025 ceramic shows broadband NIR luminescence centered at similar to 1480 nm from Ni2+ with long emission lifetime (28 A mu s), which can cover the optical communication window and be applied in broadband optical amplifiers. The multifunctional BNT-Ni-0.025 ceramic shows potentials in the application of optical-electrical-magnetic areas.
ISSN: 0957-4522
EISSN: 1573-482X
DOI: 10.1007/s10854-017-7012-5
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