Vibrational And Luminescence Studies Of M~iin(moo_4)_2 (m~i = K, Rb) And M~ial(moo_4)_2 (m~i = K, Na) Molybdates Doped With Chromium(iii) Prepared Via The Pechini Method

摘要

KAl(MoO_4)_2, NaAl(MoO_4)_2, KIn(MoO_4)_2 and RbIn(MoO_4)_2 doped with 2% of chromium(III) ions have been prepared by the Pechini method. The grains of the obtained samples ranged from about 50 to a few hundreds of nm. Raman and IR studies showed that vibrational properties have been modified in comparison with the bulk material. The luminescence revealed that the prepared materials have similar properties as the bulk samples. However, the prepared samples are characterized by weaker eiectron-phonon coupling, in comparison with the bulk materials.