Structural Analysis, Magnetocaloric Effect, and Critical Exponents for La0.6Sr0.2Na0.2MnO3 Manganite

  • Sobhi HciniEmail author
  • Raihane Charguia
  • Abdessalem Dhahri
  • Mohamed Lamjed Bouazizi
Original Paper


This work focuses on the structural, magnetocaloric effect, and critical exponent investigations of La0.6Sr0.2Na0.2MnO3 manganite prepared via sol–gel method. XRD analysis confirms the rhombohedral structure with \( R\overline{3}c \) symmetry for this sample, and Rietveld method was used to estimate its different structural parameters. The sample presents FM-PM phase transition of second-order type at TC = 309 K. The maximum of magnetic entropy change (−\( \Delta {S}_M^{max} \)) and relative cooling power (RCP) reach values of about 3.57 J kg−1 K−1 and 214.46 J kg−1, respectively (at μ0H = 5 T). These values indicate that La0.6Sr0.2Na0.2MnO3 sample can be used as active magnetic refrigerator. Critical exponents (β, γ, and δ) of the sample have studied by analyzing the M(μ0H, T) isotherms using different techniques. The estimated values of these critical exponents are found to be different to those predicted for standard theoretical models.


Manganite0073 Structural analysis Magnetocaloric effect Critical exponents 


Funding information

The authors gratefully acknowledge Qassim University, represented by the Deanship of Scientific Research, on the material support for this research under the number 5158-cosabu-2018-1-14-S during the academic year 2018


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Sobhi Hcini
    • 1
    Email author
  • Raihane Charguia
    • 2
    • 3
  • Abdessalem Dhahri
    • 4
  • Mohamed Lamjed Bouazizi
    • 5
  1. 1.Faculty of Science and Technology of Sidi Bouzid, Research unit of valorization and optimization of exploitation of resourcesKairouan UniversitySidi BouzidTunisia
  2. 2.College of Sciences and Arts, Department of PhysicsQassim UniversityBuraydahSaudi Arabia
  3. 3.Physics Laboratory of the Condensed Matters, Faculty of Sciences, Department of PhysicsUniversity of Tunis El ManarTunisTunisia
  4. 4.Faculty of Sciences of Monastir, Department of Physics, Laboratory of Physical Chemistry of MaterialsMonastir UniversityMonastirTunisia
  5. 5.College of Engineering, Mechanical DepartmentPrince Sattam Bin Abdulaziz UniversityAl-KharjSaudi Arabia

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