Akademska digitalna zbirka SLovenije - logo
VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Impact of polymeric precursor and auto-combustion on the structural, microstructural, magnetic, and magnetocaloric properties of ▫$La_{0.8}Sr_{0.2}MnO_3$▫
    Lakouader, Aafak ...
    In this work, La0.8Sr0.2MnO3 (LSMO) nanopowders are synthesized using two different methods: Pechini (LSMO-PC) and auto-combustion (LSMO-AC). Nanoparticle sizes, structural, magnetic, and ... magnetocaloric properties were determined and compared. The X-ray diffraction confirms the coexistence of two phases; rhombohedral symmetry with space group R-3c and orthorhombic symmetry with space group Pbnm. The rhombohedral phase is dominant. The scanning electron microscope images show that LSMO-PC has larger nanoparticle sizes (∼495 nm) than LSMO-AC (∼195 nm). The samples exhibit ferromagnetic properties with distinct hysteresis loops and Curie temperatures of 340 K and 290 K for LSMO-PC and LSMO-AC, respectively. The variation of the magnetic entropy was measured indirectly using the Maxwell approach with increasing magnetic field. For LSMO-PC it reaches a maximum -ΔSM = 1.69 J/kg.K at 340 K and ΔH = 5 T. The associated adiabatic temperature change ΔTM is 1.04 K. While LSMO-PC demonstrates superior magnetic and magnetocaloric properties, LSMO-AC displays significant magnetocaloric thermal stability. The obtained values make LSMO-PC and LSMO-AC promising candidates for eco-friendly room-temperature magnetocaloric applications.
    Vir: Journal of magnetism and magnetic materials [Elektronski vir]. - ISSN 1873-4766 (Vol. 586, [article no.] 171225, Nov. 2023, str. 1-11)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 163997187

    Povezava(-e):

    https://www.sciencedirect.com/science/article/pii/S0304885323008752?via%3Dihub
    DOI

Vnos na polico