PIPPARD RELATIONS MODIFIED FOR THE RAMAN FREQUENCY SHIFTS CLOSE TO I-II PHASE TRANSITION IN S-TRIAZINE
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Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
World Scientific Publ Co Pte Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The pressure dependence of the frequency shifts 1/omega(partial derivative omega/partial derivative T)(P) is calculated from the 1/omega(partial derivative omega/partial derivative P)(T) for the Raman modes I and IV according to the spectroscopic modifications of the Pippard relations. The observed Raman frequencies of those modes are used for this calculation close to the I-II phase transition in s-triazine. From the frequency shifts, the isothermal compressibility kappa(T) and the specific heat C-P are also calculated as a function of pressure close to the I-II phase transition in s-triazine. Our calculated values of 1/omega(partial derivative omega/partial derivative T)(P) kappa(T) and C-P can be compared with the experimental measurements at various pressures in the phases I and II of s-triazine.
Açıklama
Anahtar Kelimeler
Pippard relations, Raman modes, phase transition, s-triazine
Kaynak
International Journal of Modern Physics B
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
25
Sayı
32
