Raman linewidths calculated as a function of temperature in NaNO2
Yükleniyor...
Dosyalar
Tarih
2009
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley-V C H Verlag Gmbh
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The temperature dependence of the damping constant is calculated for some Raman modes in NaNO2 using the soft mode-hard mode coupling model and the energy fluctuation model. The damping constant is fitted to the measured Raman bandwidths of those modes, which is well described by the soft mode-hard mode coupling model. The values of the activation energy are extracted from the damping constant for the Raman modes, which are much greater than k(B)T(C) = 0.04 eV for NaNO2 close to the transition temperature (T-C = 436 K). This is an indication that NaNO2 undergoes an order-disorder phase transition. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Açıklama
Anahtar Kelimeler
Raman Linewidths
Kaynak
Physica Status Solidi B-Basic Solid State Physics
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
246
Sayı
5
