Temperature dependence of spectral positions and widths of 5DJ → 7FJ fluorescence lines originating from Sm2+ ions in SrFCl crystals |
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| Affiliation: | 1. LCMCP-ENSCP UMR-CNRS7574, Laboratoire de Chimie de la Matiére Condensée, 11 Rue Pierre and Marie Curie, 75231, Paris Cedex 05, France;2. Vinca Institute of Nuclear Sciences University of Belgrade, PO Box 522, 11001, Belgrade, Serbia;1. Department of Engineering Mechanics, School of Naval Architecture, Ocean and Civil Engineering (State Key Laboratory of Ocean Engineering), Shanghai Jiao Tong University, Shanghai 200240, China;2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai 200240, China;3. Institute of Optical Communication and Optoelectronics (Key Laboratory of Optical Communication & Lightwave Technologies under Ministry of Education), Beijing University of Posts and Telecommunications, Beijing 100876, China;1. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;2. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;3. Department of Physics and Interdisciplinary Program of Biomedical, Mechanical & Electrical Engineering, Pukyong National University, Busan 608-737, Republic of Korea;1. Instituto de Física and PGCIMAT, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500 - Caixa Postal 15051 - CEP 91501-970, Porto Alegre - RS, Brazil;2. Grupo de Investigación Integrar, Departamento de Física, Universidad de Pamplona, ciudad universitaria, Pamplona, Colombia;3. Advanced Studies of the Frontier (ALEF), Universidad Simon Bolivar, Cúcuta, Colombia;1. Karlsruhe Institute of Technology, Center for Functional Nanostructures, Haid-und-Neu-Straße 6, 76131 Karlsruhe, Germany;2. Karlsruhe Institute of Technology, Institute of Functional Interfaces, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;3. Technische Universität Darmstadt, Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany;4. Max-Planck-Institute for Intelligent Systems, Heisenbergstr. 3, 70569 Stuttgart, Germany;5. Biophysical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany, Germany;6. Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany |
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| Abstract: | The temperature dependence of the spectral positions and widths of the photoluminescence lines corresponding to the 5D0 → 7F0, 5D0 → 7F1 and 5D1 → 7F0 electronic transitions in Sm2+-doped SrFCl crystal was measured between 87 and 625 K at ambient pressure. The temperature dependence of the homogeneous line width Γh(T) for all these transitions in the whole temperature range used can be described by the two-phonon Raman scattering of acoustic phonons with the Debye temperature TD ≈ 230 K. Comparison of the temperature- and pressure-induced shifts revealed why all the emission lines studied show the blue temperature shifts. It is so because a greater part of the line shift is caused by the thermal expansion of the host crystal and not by enhancement of the electron–phonon coupling with increasing temperature. |
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