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Time-resolved spectroscopy in LiCaAlF6 doped with Cr3+ as a function of pressure and temperature: Excited-state crossover and phase-transition effects |
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| Authors: | MN Sanz-Ortiz F Rodríguez I Hernández R Valiente S Kück |
| Institution: | 1. DCITIMAC, Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain;2. Dpto. Física Aplicada, Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain;3. Physikalisch-Technische Bundesanstalt, Working Group 4.13, Bundesallee 100, 38116 Braunschweig, Germany;1. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain;2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, 28049 Madrid, Spain;3. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain |
| Abstract: | This work investigates phase transition (PT) and excited-state-crossover (ESCO) effects on the photoluminescence (PL) properties of LiCaAlF6: Cr3+. The structural requirements for changing the Cr3+ PL behavior from a broad-band emission at 1.59 eV (781 nm) at ambient conditions, to ruby-like narrow-line emission at 1.87 eV (663 nm) are analyzed in the 0–35 GPa range. We report a PL study on LiCaAlF6: Cr3+ by means of time-resolved emission as a function of pressure and temperature. In particular we focus on the PL variations occurring around the pressure-induced trigonal-to-monoclinic first-order PT in LiCaAlF6 at 7 GPa. |
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