Luminomagnetic K2Gd1-xZr(PO4)(3):Tb-x(3+) phosphor with intense green fluorescence and paramagnetism
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Luminomagnetic K2Gd1-xZr(PO4)(3):Tb-x(3+) phosphor with intense green fluorescence and paramagnetism
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| Creator |
Kumar, Raj
Shanker, Ravi Kotnala, Ravinder Kumar Chawla, Santa |
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| Subject |
Materials Science
Applied Physics/Condensed Matter |
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| Description |
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.
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| Publisher |
Wiley-VCH Verlag
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| Date |
2013-09
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3142/1/Luminomagnetic.pdf
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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| Relation |
http://npl.csircentral.net/3142/
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