VASSEUR, Sébastien; DUGUET, Etienne; PORTIER, Josik; GOGLIO, Graziella; MORNET, Stéphane; HADOVÁ, E.; KNÍ?EK, Karel; MARYŠKO, M.; VEVERKA, P.; POLLERT, E.

doi:10.1016/j.jmmm.2005.09.026

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VASSEUR, Sébastien
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DUGUET, Etienne
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

PORTIER, Josik
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Magnetism and Magnetic Materials. 2006, vol. 302, n° 2, p. 315-320

Elsevier

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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.< Leer menos

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Magnetic hyperther

Manganese perovskites

Nanoparticles

Magnetic properties

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Lanthanum manganese perovskite nanoparticles as possible in vivo mediators for magnetic hyperthermia

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