Magnetothermic Effect in Core/Shell Nanocomposite (La,Sr)MnO3/SiO2

Approaches have been developed for the creation of magnetic core/shell nanocomposites derived from (La,Sr)MnO 3 and SiO 2 with particle diameter 40-45 nm. SQUID magnetometry has shown that the presence of the SiO 2 shell on the surface of the manganite nanoparticles results in lower saturation magnetization values at the constant blocking temperature. These magnetic nanocomposites displayed a magnetothermic effect with heating of the particles to 43-45 °C in an alternating magnetic field with frequency 300 kHz. This behavior indicates that these materials may be used as inducers of magnetic hyperthermia.