Lanthanum manganese perovskite nanoparticles as possible in vivo mediators for magnetic hyperthermia
Langue
en
Article de revue
Ce document a été publié dans
Journal of Magnetism and Magnetic Materials. 2006, vol. 302, n° 2, p. 315-320
Elsevier
Résumé en anglais
Manganese perovskite La0.75Sr0.25MnO3 nanoparticles of the crystallite size 20–180 nm were prepared starting from citrate gel precursor by annealing in the range of 570–900 °C. It is shown that the decrease of the crystallite ...Lire la suite >
Manganese perovskite La0.75Sr0.25MnO3 nanoparticles of the crystallite size 20–180 nm were prepared starting from citrate gel precursor by annealing in the range of 570–900 °C. It is shown that the decrease of the crystallite size leads to a gradual decrease of the magnetization and Curie temperature. The observed behaviour is a consequence of a non-collinear spin arrangement at the surface layer of crystallites, estimated to be of ~5 nm. Magnetic heating experiments were carried out with an aqueous stable suspension of a selected sample (Mit = 42 emu/g, Tc = 352 K) under an alternating field of Hmax=88mT, v = 108 kHz. The yielded values of specific absorption rate (SAR) were found to be larger than 500 W/gMn at 27 °C and 350 W/gMn at 37 °C.< Réduire
Mots clés en anglais
Magnetic hyperther
Manganese perovskites
Nanoparticles
Magnetic properties
Origine
Importé de halUnités de recherche