Order-disorder phase transition in NH4AlF4 |
| |
| Authors: | H Yurtseven A Yanik |
| |
| Affiliation: | (1) Department of Physics, Middle East Technical University, Ankara, 06531, Turkey;(2) Department of Physics, Istanbul Technical University, Maslak, Istanbul, Turkey |
| |
| Abstract: | In this study we calculate the specific heat CVI for NH4AlF4 due to the nearest-neighbor interactions between the NH+
4 tetrahedra using an Ising model superimposed on an Einstein and/or Debye model. The specific heat CVI calculated using a power-law formula is in good agreement with the observed CP for the NH4AlF4 system. This is an indication that NH4AlF4 undergoes a weak first-order or a nearly second-order phase transition as predicted by our model. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
