| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Sao Paulo, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil
[2] Univ Fed Triangulo Mineiro, Inst Ciencias Tecnol & Exatas, BR-38025180 Uberaba, MG - Brazil
[3] Montana State Univ, Phys Dept, Bozeman, MT 59717 - USA
Total Affiliations: 3
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| Document type: | Journal article |
| Source: | Brazilian Journal of Physics; v. 51, n. 6 JUL 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The mean-field theory is revisited in the classical and quantum mechanical limits. Taking into account the boundary conditions at the phase transition and the third law of the thermodynamics, the physical properties of the ordered and disordered phases are reported. The equation for the order parameter predicts the occurrence of a saturation of Psi(2) similar to 1 near Theta(S), and the temperature below the quantum mechanical ground state is reached. The theoretical predictions are also compared with high- resolution thermal expansion data of SrTiO3 single crystals and other some previous results. An excellent agreement has been found suggesting a universal behavior of the theoretical model to describe continuous structural phase transitions. (AU) | |
| FAPESP's process: | 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry |
| Grantee: | Carlos Alberto Moreira dos Santos |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 19/12798-3 - The crystal structure of niobium and the anisotropy of its superconducting properties |
| Grantee: | Carlos Alberto Moreira dos Santos |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |