| Temperature and pressure dependence of the optical properties of Cr(3 + )-doped Gd(3)Ga(5)O(12) nanoparticles. | |
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MedLine Citation:
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PMID: 21576777 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Since the crystal-field strength at the Cr(3 + ) site is very close to the excited-state crossover (ESCO), this work investigates the optical properties of Cr(3 + )-doped Gd(3)Ga(5)O(12) (GGG) nanoparticles as a function of temperature and pressure in order to establish the effect of the ESCO on the optical behaviour of nanocrystalline GGG. Luminescence, time-resolved emission and lifetime measurements have been performed on GGG:0.5% Cr(3 + ) nanoparticles in the 25-300 K temperature range, as well as under hydrostatic pressure up to 20 GPa. We show how low temperature and high pressure progressively transforms [Formula: see text] broadband emission into a ruby-like [Formula: see text] luminescence. This behaviour together with the lifetime dependence on pressure and temperature are explained on the basis of the spin-orbit interaction between the (4)T(2) and (2)E states of Cr(3 + ). |
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Authors:
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R Martín-Rodríguez; R Valiente; F Rodríguez; M Bettinelli |
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Publication Detail:
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Type: Journal Article Date: 2011-05-17 |
Journal Detail:
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Title: Nanotechnology Volume: 22 ISSN: 1361-6528 ISO Abbreviation: Nanotechnology Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-05-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101241272 Medline TA: Nanotechnology Country: England |
Other Details:
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Languages: eng Pagination: 265707 Citation Subset: IM |
Affiliation:
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MALTA Consolider Team, Departamento Física Aplicada, Facultad de Ciencias, Universidad de Cantabria, Avenida de Los Castros s/n, 39005 Santander, Spain. Instituto de Condiciones Extremas (Centro Asociado CSIC ICMA Zaragoza), Santander, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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