Influence of Non-magnetic Ti{sup 4+} Ion Doping at Mn Site on Structural, Magnetic, and Magnetocaloric Properties of La{sub 0.5}Pr{sub 0.2}Sr{sub 0.3}Mn{sub 1−x}Ti{sub x}O{sub 3} Manganites (x = 0.0 and 0.1)

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

DOI:https://doi.org/10.1007/S10948-018-4825-2· OSTI ID:22921250

Smiy, S.; Moussi, R. ^[1]; Ali, A. Ben ^[2]; Hcini, S. ^[1]; Costa, B. F. O. ^[3]; Hlil, E. K. ^[4]; Dhahri, E. ^[2]

---

1. University of Kairouan, University Campus Agricultural City, Research Unit of Valorization and Optimization of Exploitation of Resources, Faculty of Science and Technology of Sidi Bouzid (Tunisia)
2. Université de Sfax, Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax (Tunisia)
3. University of Coimbra, Physics Department (Portugal)
4. CNRS-Université J. Fourier, Institut Néel (France)

Polycrystalline perovskite AMn{sub 1−x}TiO{sub 3} with A = La{sub 0.5}Pr{sub 0.2}Sr{sub 0.3} (x = 0.0 and 0.1) have been prepared using solid-state reaction method. X-ray powder diffraction and Rietveld refinement revealed that all samples crystallize in a rhombohedral structure with space group R 3-bar c From M–T curve, we determined the Curie temperature, where the magnetization value decreases abruptly. The Curie temperature (T{sub C}) decreases from 280 to 123 K when the percentage of Ti increases to 10%. The values of the magnetization M(H) decrease when increasing the Ti content. Moreover, the magnetocaloric effect (MCE) was estimated in terms of isothermal entropy change (−ΔS{sub M}) using the M(T, μ{sub 0}H) data and employing the thermodynamic Maxwell equation. In addition, using a phenomenological model, we determine magnetocaloric effect from the calculation of magnetization as a function of temperature under different external magnetic fields. Also, we can determine the relative cooling power (RCP) and the specific heat which varies from 2.803 to 7.354 J/(kg/K) for the undoped sample from M(T, μ{sub 0}H) data at different magnetic fields theoretically.

• OSTI ID: 22921250
• 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

36 MATERIALS SCIENCE
CALORIMETRY
CURIE POINT
DOPED MATERIALS
ENTROPY
LANTHANUM COMPOUNDS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANATES
MAXWELL EQUATIONS
PEROVSKITE
POLYCRYSTALS
PRASEODYMIUM COMPOUNDS
SPACE GROUPS
SPECIFIC HEAT
STRONTIUM COMPOUNDS
TEMPERATURE DEPENDENCE
THERMODYNAMICS
TITANIUM ADDITIONS
TRIGONAL LATTICES
X-RAY DIFFRACTION