Study of Critical Behavior and Magnetocaloric Effect in Nd{sub 1− x} Sr{sub x}MnO{sub 3} Compounds

Journal Article · Sat Jun 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5040-5· OSTI ID:22921214

Dhahri, E. ^[1]; Hlil, E. K. ^[2]

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1. Faculty of Sciences of Sfax University, Laboratory of Applied Physics (Tunisia)
2. CNRS et Université Joseph Fourier, Institut Néel (France)

In this paper, we have investigated the influence of substitution of Nd by Sr on the structural, magnetic, and magnetocaloric properties of Nd{sub 1 − x}Sr{sub x}MnO{sub 3} (x = 0.3 and x = 0.4). These compounds were prepared using the solid state method. The structural, morphological, and magnetic properties of our system were characterized by XRD, MEB techniques, and a magnetometer for magnetic characterization. The Rietveld refinement has revealed the coexistence of both Pnma orthorhombic and R-3c rhombohedral phases. The magnetic data indicate that the compounds exhibit a continuous paramagnetic (PM) to ferromagnetic (FM) phase transition. In addition, the critical behavior in both compounds associated with the magnetic phase transition has been studied by the magnetization isotherms. The critical exponents are deduced using various techniques such as the modified Arrott plot, Kouvel–Fisher plot, and critical isotherm technique. Finally, the results obtained of the magnetocaloric effect are in agreement with the reported values of previous researches. These results show that our samples can be used as a magnet refrigerant at room temperature.

• OSTI ID: 22921214
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 6 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALORIMETRY
CURIE POINT
ISOTHERMS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETOMETERS
MAGNETS
MANGANATES
NEODYMIUM COMPOUNDS
ORTHORHOMBIC LATTICES
PARAMAGNETISM
PHASE TRANSFORMATIONS
STRONTIUM COMPOUNDS
TRIGONAL LATTICES
X-RAY DIFFRACTION