2015/08/13 by Vivian M. Andrade, Andrade, Vivian M., R.J. Caraballo-Vivas +13 · 2 citations
Materials Science · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.1508.03384
openalex publication_date 2015/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Manganites have been attracted considerable attention due to some intriguing\nmagnetic properties, such as magnetoresistance, spin glass behavior and\nsuperparamagnetism. In recent years, some studies point to the effect of\nparticle size and dimensionality of these compounds in their magnetic features.\nParticularly, LaCaMnO material research is well explored concerning the bulk\nmaterial. To overcome the lack of the information we successfully produced\nadvanced nanostructures of La0.6Ca0.4MnO3 manganites, namely\nnanotubes and nanoparticles by using a sol-gel modified method, to determine\nthe size particle effect on the magnetism. The manganites crystal structure,\nmagnetic and magnetocaloric properties were studied in a broad temperature\nrange. Transmission electron microscopy revealed nanoparticles with sizes from\n45 up to 223 nm, depending on the calcination temperature. It was found that\nthe magnetic and magnetocaloric properties can be optimized by tuning the\nparticle size; for instance, the magnetic transition broadening by decreasing\nthe particle size. We report the relative cooling power (RCP) of these samples;\nit was found that the best RCP was observed for the 223 nm particle (508 J/Kg).\nFinally, this work contributes to the research on the magnetic properties and\nmagnetocaloric potentials in nanostructured systems with distinct morphologies.\n