Lanthanum manganese perovskite nanoparticles as possible in vivo mediators for magnetic hyperthermia
Language
en
Article de revue
This item was published in
Journal of Magnetism and Magnetic Materials. 2006, vol. 302, n° 2, p. 315-320
Elsevier
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Magnetic hyperther
Manganese perovskites
Nanoparticles
Magnetic properties
Origin
Hal imported