Kumar, Raj and Shanker, Ravi and Kotnala, Ravinder Kumar and Chawla, Santa (2013) Luminomagnetic K2Gd1-xZr(PO4)(3):Tb-x(3+) phosphor with intense green fluorescence and paramagnetism. Physica status solidi (A), 210 (9). pp. 1933-1937. ISSN 1862-6300

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Multimetallic complex phosphate K2Gd1-xZr(PO4)(3):Tb-x(3+) (0x50) synthesized by solid state diffusion exhibit intense green fluorescence and paramagnetic behaviour. Monophasic particles of dimensions ranging from few hundred nanometers to few micrometers could be obtained. Photo excitation at 274nm corresponding to Gd3+ transition(8)S(7/2)-I-6(J) and Gd3+-Tb3+ charge transfer followed by emission from D-5(J(J=3,4)) to F-7(J(J=3,4,5,6)) levels of Tb3+ ions is observed to be the most effective photoluminescence mechanism. Paramagnetic nature was proved by VSM study. Variation of paramagnetism in undoped K2GdZr(PO4)(3) and K2Gd1-xZr(PO4)(3):Tb-x(3+) particles and quantitative analysis by EPR indicate the role of unpaired 4f electron spin of trivalent rare earth ions in the lattice for making the particles paramagnetic.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier.
Subjects: Materials Science
Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 22 Jul 2020 09:27
Last Modified: 22 Jul 2020 09:27
URI: http://npl.csircentral.net/id/eprint/3142

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