Synthesis, structural, magnetic and magnetocaloric properties of La0.8Sr0.2MnO3 nanoparticles

• Published in: Journal of thermal analysis and calorimetry 2019-04, Vol.136 (2), p.621-627
• Main Authors: Salaheldin, Taher A., Ghani, A. A., AboZied, Abd El-Rahman T., Ali, Ahmed I.
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Curie temperature; Dependence; Ferromagnetism; Inorganic Chemistry; Magnetic properties; Magnetism; Magnetization; Measurement Science and Instrumentation; Nanoparticles; Phase transitions; Physical Chemistry; Polymer Sciences; Refrigeration; Sol-gel processes; Synthesis; X-ray diffraction
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-018-7642-8

In this work, we reported a detailed study on the synthesis, structural and magnetic properties of nanocrystalline La 0.8 Sr 0.2 MnO 3 . The synthesized nanoparticles were prepared using a sol–gel method and characterized using X-ray diffraction and high-resolution transmission electron microscope. The average particle size was found in the range from 40 to 45 nm. The magnetization versus temperature M ( T ) measurements as well as magnetization field dependence M ( H ) have been investigated using vibrating-sample magnetometer. The magnetization as a function of temperature M ( T ) indicated a broad second-order magnetic phase transition from ferromagnetic state to paramagnetic state in the Curie temperature region (320–340 K). The magnetocaloric effect of the sample has been estimated and presented a maximum magnetic entropy change |Δ S M | max  = 0.86 J kg −1  K −1 with relative cooling power = 62.12 J kg −1 at magnetic field ( H ) = 2 T . Based on the result of magnetocaloric properties, the investigated sample could be considered as a good refrigerant material for near room temperature magnetic refrigeration.