TY - JOUR
T1 - La0.6Ca0.2Na0.2MnO3 Perovskite
T2 - Structural, Magnetic, Critical, and Magnetocaloric Properties
AU - Mechi, Nesrine
AU - Hcini, Sobhi
AU - Alzahrani, Bandar
AU - Boudard, Michel
AU - Dhahri, Abdessalem
AU - Ben Youssef Bouazizi, Mohamed Lamjed
N1 - Publisher Copyright:
© 2019, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - The results of structural, magnetic, critical, and magnetocaloric characterizations of La0.6Ca0.2Na0.2MnO3 perovskite have been reported. XRD analysis of the sample synthesized using sol-gel method shows good crystallization in the R3 ¯ c rhombohedral structure. From M(T) curve, a second-order ferromagnetic-paramagnetic (FM-PM) phase transition appears at the Curie temperature (TC) around 275 K. Critical exponents (β, γ, and δ) have been evaluated using different techniques such as modified Arrott plots (MAP), Kouvel-Fisher (KF) method, and critical isotherm (CI). We found that the critical exponents of the prepared sample agree well with those of the mean-field model. We have also estimated the magnetic entropy change (−ΔSM) and relative cooling power (RCP) for the sample which obey power laws as −∆SM = a(μ0H)n and RCP = A(μ0H)N, respectively. ΔSM and RCP values were relatively higher, making the sample promising candidate for magnetic refrigeration technology. The estimated values of the magnetic ordering parameters (n and N) are used to confirm the reliability of the evaluated critical exponent.
AB - The results of structural, magnetic, critical, and magnetocaloric characterizations of La0.6Ca0.2Na0.2MnO3 perovskite have been reported. XRD analysis of the sample synthesized using sol-gel method shows good crystallization in the R3 ¯ c rhombohedral structure. From M(T) curve, a second-order ferromagnetic-paramagnetic (FM-PM) phase transition appears at the Curie temperature (TC) around 275 K. Critical exponents (β, γ, and δ) have been evaluated using different techniques such as modified Arrott plots (MAP), Kouvel-Fisher (KF) method, and critical isotherm (CI). We found that the critical exponents of the prepared sample agree well with those of the mean-field model. We have also estimated the magnetic entropy change (−ΔSM) and relative cooling power (RCP) for the sample which obey power laws as −∆SM = a(μ0H)n and RCP = A(μ0H)N, respectively. ΔSM and RCP values were relatively higher, making the sample promising candidate for magnetic refrigeration technology. The estimated values of the magnetic ordering parameters (n and N) are used to confirm the reliability of the evaluated critical exponent.
KW - Critical behavior
KW - Magnetic properties
KW - Magnetocaloric effect
KW - Perovskites
KW - Structural analysis
UR - https://www.scopus.com/pages/publications/85075970882
U2 - 10.1007/s10948-019-05353-9
DO - 10.1007/s10948-019-05353-9
M3 - Article
AN - SCOPUS:85075970882
SN - 1557-1939
VL - 33
SP - 1385
EP - 1393
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 5
ER -