| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Landau model for the elastic properties of the ferroelastic crystal Rb4LiH3(SO4)4 | G. Quirion
; W. Wu
; J. Rideout
; B. Mroz
; | Date: |
2 Jun 2006 | Subject: | Other | Abstract: | We report a detailed investigation of the elastic properties of Rb4LiH3(SO4)4 measured as a function of temperature and pressure. Rb4LiH3(SO4)4 is known to show a 4 - 2 ferroelastic phase transition at Tc = 134 K. In order to clarify the nature of the order parameter associated with that structural transition, we compare our finding to two distinct phenomelogical Landau models. The coupling parameters of both models are all determined using the temperature dependence of the strain tensor, as well as the pressure dependence dTc/dP = 19.1 K/kbar, prior to the calculation of the elastic constants. Our comparison indicates that the ferroelastic transition in Rb4LiH3(SO4)4 is fully consistent (within a few percent) with the predictions of a pseudo-proper model, showing at the same time that the primary mechanism leading to the phase transition is not driven by strains. Our analysis also refutes the idea that Rb4LiH3(SO4)4 is the first ferroelastic compound showing incomplete softening, of the effective soft acoustic mode Csoft, at Tc. | Source: | arXiv, cond-mat/0606064 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |