Assessment of near Pr2/3Sr1/3MnO3 oxide in magnetic cooling

International audienc

Magnetic properties of tin ferrites nanostructures doped with transition metal

International audienc

Magnetocaloric Properties of Zinc-Nickel Ferrites Around Room Temperature

International audienc

Effect of zinc concentration on the structural and magnetic properties of mixed Co–Zn ferrites nanoparticles synthesized by sol/gel method

International audienc

Coexistence of blocked, metamagnetic and canted ferrimagntic phases at high temperature in Co–Nd ferrite nanorods

International audienc

Magnetocaloric Properties of Zinc-Nickel Ferrites Around Room Temperature

In this paper, structural, magnetic, and magnetocaloric properties of zinc-doped nickel ferrite, Zn1−xNixFe2O4 (x = 0.3 and 0.4) were investigated. The samples were prepared using solid-state reaction. X-ray diffraction (XRD) and magnetization measurements were performed to study crystallographic structure and magnetic properties. For a magnetic field changing from 0 to 5 T, the corresponding isothermal entropy change was found to be near 1.4 J/kg K for both samples. The decreasing of Ni content from x = 0.4 to 0.3, enables to shift the Curie temperature of Zn1−xNixFe2O4 from 450 K toward (325 K). As main results, it was found that the relative cooling power (RCP) could be significantly enhanced by changing Ni concentration in Zn1−xNixFe2O4 (505 J/kg (for x = 0.3) and 670 J/kg (for x = 0.4)), which is considered as a recommended parameter for a wide temperature range in magnetic refrigeration application. Our finding should inspire and open new ways for the enhancement of the magnetocaloric effect in spinel ferrite-based materials

Synthesis and magnetic properties of tin spinel ferrites doped manganese

International audienc

Large Magnetic Entropy Change in Pr2/3Sr1/3MnO3-CuO Composite at Room Temperature

We report in this paper the impact of copper oxide (CuO) on the structural, magnetic, and magnetocaloric properties of Pr2/3Sr1/3MnO3 (PSMO) material. Our samples were synthesized by conventional solid-state reaction. The phase formation with no impurities was verified using the X-ray diffraction (XRD). The magnetic properties measured by Magnetic Properties Measurement System (MPMS) show the impact of the AFM CuO semiconductor on the magnetization and the transition temperature of the composite. The magnetic entropy changes were calculated from the isothermal curve of the magnetization as a function of the magnetic field. It is found that a small amount of copper oxide is enough to enhance the magnetocaloric properties of our materials

Composite (La0.45Nd0.25)Sr0.3MnO3/5CuO materials for magnetic refrigeration applications

International audienc

Magnetocaloric effect and electrical properties of (0.95)La 0.45 Nd 0.25 Sr 0.3 MnO 3 /(0.05)CuO composites

International audienc