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Photoluminescence properties of Sm2-doped BaBr2 under hydrostatic pressure

 
: Wiegand, M.-C.; Sievers, W.; Lindner, J.K.N.; Tröster, T.; Schweizer, S.

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Preprint urn:nbn:de:0011-n-1889508 (238 KByte PDF)
MD5 Fingerprint: 15e38de15d189d33a605bf506c66b2fc
Erstellt am: 20.4.2013


Journal of luminescence 131 (2011), Nr.11, S.2400-2403
ISSN: 0022-2313
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer CSP ()

Abstract
Photoluminescence spectra of Sm2-doped BaBr2 have been measured under hydrostatic pressures up to 17 GPa at room temperature. In the low pressure range a red-shift of the broad 5d4f transition of -145 cm -1/GPa is observed. From 5 to 8 GPa a phase mixture of the initial orthorhombic phase and the high-pressure monoclinic phase gives rise to two 5d4f bands, which are strongly overlapping. Above 8 GPa the crystal is completely transformed to its high-pressure phase where two different Sm2 sites exist, but only one broad 5d4f transition is detected. It exhibits a red-shift of -36 cm-1/GPa. In addition, the line shifts of the 5D07FJ (J=0, 1, 2) transitions are investigated. Linear shifts of -19 cm-1/GPa for J=0, 2 and of -13 cm-1/GPa for J=1 are observed in the pressure range from 0 to 5 GPa.

: http://publica.fraunhofer.de/dokumente/N-188950.html