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Critical behavior near room temperature in La₀.₇₅Ca₀.₀₅Na₀.₂₀MnO₃ sample

Author:
Bouzidi, Souhir, Gdaiem, Mohamed Amara, Dhahri, J., Hlil, E. K.
Source:
RSC advances 2019 v.9 no.24 pp. 13808-13813
ISSN:
2046-2069
Subject:
ambient temperature, equations, models
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 TC = 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–μ₀H–T) data around TC collapsed into two curves, obeying the single scaling equation with ε = (T − TC)/TC being the reduced temperature. These results suggest short-range interaction in our sample.
Agid:
6428043