The Mean-Field Theory for the Study of the Magnetocaloric Effect of Nd{sub 0.67}Ba{sub 0.33}Mn{sub 0.98}Fe{sub 0.02}O{sub 3} Manganite

Journal Article · Thu Mar 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4259-2· OSTI ID:22777046

Hsini, Mohamed ^[1]; Hcini, Sobhi ^[2]; Boudard, Michel ^[3]; Zemni, Sadok ^[1]

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1. University of Monastir, Laboratory of Physical Chemistry of Materials, Faculty of Science of Monastir, Department of Physics (Tunisia)
2. University of Kairouan, Research Unit of Valorization and Optimization of Exploitation of Resources, Faculty of Science and Technology of Sidi Bouzid, University Campus Agricultural City (Tunisia)
3. Univ. Grenoble Aples, CNRS, LMGP (France)

In this paper, we exploit the mean-field theory and the Bean-Rodbell model to justify the magnetocaloric effect (MCE) on Nd{sub 0.67}Ba{sub 0.33}Mn{sub 0.98}Fe{sub 0.02}O{sub 3} manganite. The modeling of magnetic properties was investigated. The Bean-Rodbell equation of state leads the system to second-order ferromagnetic (FM)-paramagnetic (PM) phase transition. The expressions describing the magnetic entropy change under the influence of magnetic field have been derived. A large magnetic entropy has been observed in our sample with a peak centered on the Curie temperature. The theoretical calculations are compared with experimental behavior.

• OSTI ID: 22777046
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 3; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPARATIVE EVALUATIONS
CURIE POINT
ENTROPY
EQUATIONS OF STATE
EXPERIMENTAL DATA
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MEAN-FIELD THEORY
NEODYMIUM COMPLEXES
PARAMAGNETISM
PHASE TRANSFORMATIONS