Volume 129, number 4 CHEMICALPHYSICS LETTERS 5 September 1986 zyxwvutsrqpon ENERGY TRANSFER BETWEEN MANGANESE(lI) AND NEODYMlUM(III) IN TRANSITION-METAL FLUORIDE GLASSES R. REISFELD ‘, M. EYAL Department of Inorganic and Analytical Chemistry, The Hebrew University. 91904 Jerusalem, Israel C.K. JIZIRGENSEN DPpartement de Chimie Minkrale, Analytique et Appliquke, VniversitP de Genkve, CH-1211 Geneva 4, Switzerland and C. JACOBONI Lclboratoireaks Fluorures VA (CNRS) 449, VniversitP de Maine, 72017 LQ Mans Cedex, France Received 13 May 1986; in final form 11 June 1986 Energy trannferbetween Mn(II) and Nd(III) in glasses of composition: 36 PbF2,24 ZnF2, 35 CaF3,2 AlF3,3 YF3, 4 LaF3 In which manganese may replace all the zinc, and neodymium some lanthanum, Is studkd by dynamic and static methods. Both methods arrive at the same results Indicating Iinear dependence of transfer probability on &nor concentra- tion. These results also demonstrate energy storage in the manganese-neodymium system having applications in Nd lasers. 1. Introduction Energy transfer between Mn(I1) and Nd(IIl) in ‘oxide glasseshas been known for a long time [l-4]. In fluoride glass with mole composition 36 zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCB PbF, ,24 MnFz,35GaF3,2AlF3,3YF3,2LaF3,2ErF3 the optical spectra and luminescence of erbium(II1) and manganese (II), and the mutual energy transfer be- tween excited states of these two species, were studied PI. The purpose of the present work is to look into energy transfer between Mn(II) and Nd(III) as a The luminescence of lanthanides in fluoride glasses is characterized by more emission bands from higher excited levels than in other types of glasses [6]. Such examples may be found for praseodymium (IQ [7,8], europium (III) [9,10], holmhun(II1) [ 11,121 and er- brium(III) [13-U]. ’ Enrique Berman Professor of Solar Energy. means of ameliorating the laser properties of neody mium(II1) in fluoride glasses. 2. Experimental We have studied the following doped glasses (a-c :PMG, d PZG, where the abbreviation PMG means lead manganese gallium, and PZG lead zinc gallium (fluoride glasses)): (a) 36PbF2,24MnF,, 35GaF3, UlF3, ,3YF3, 4LaF3. (b) 26PbF2, 24MnF2, 35GaF3, 2AlF3, 3YF3, 3 .=F,, 0.2NdF3. (d) 36PbF2,24ZnF,, 35GaF,, SAW,, 3YF3, L&F,, 2NdF3, (c) 36PbF,, 24MnF,, 35GaF3, 2A1F3, 3YF3, 2LaF3, 2NdF3. The samples were prepared as in ref. [S] using metal fluorides as starting components. The samples 392 0 009-2614/86/$03.50 0 Elsevier Science Publishers B,V. (North-Holland Physics Publishing Division)