Critical behavior near room temperature in La0.75Ca0.05Na0.20MnO3 sample
Souhir Bouzidi1,2, Mohamed Amara Gdaiem1, J Dhahri1
1Laboratoire de la Matière Condensée et des Nanosciences, Département de Physique, Faculté des Sciences de Monastir, Université de Monastir Avenue de l'Environnement Monastir 5019 Tunisia gdaiem_mohamed@hotmail.fr +21673500280 +21629523640.
Abstract:
The critical behavior of La0.75Ca0.05Na0.20MnO3 was studied at around room temperature via magnetization measurements. From the relative slope, we deduced that the Tricritical Mean-Field model was the most suitable model. The estimated critical exponents were found to be β = 0.24 ± 0.004, γ = 0.98 ± 0.065 and δ = 5.08 at T C = 300 K. These critical exponents satisfied the Widom scaling relation δ = 1 + γ/β, implying the reliability of our values. Based on the critical exponents, the magnetization-field-temperature (M-μ 0 H-T) data around T C collapsed into two curves, obeying the single scaling equation with ε = (T - T C)/T C being the reduced temperature. These results suggest short-range interaction in our sample.
Related Concept Videos
03:46Qualitative Analysis
For instance, group IV...
01:27Atomic Spectroscopy: Effects of Temperature
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...