title: Iron-Doped (La,Sr)MnO3 Manganites as Promising Mediators of Self-Controlled Magnetic Nanohyperthermia.
abstract: Fe-doped La0.77Sr0.23Mn1 - y Fe y O3 nanoparticles have been synthesized by sol-gel method, and ceramic samples based on them were sintered at 1613 K. Crystallographic and magnetic properties of obtained nanoparticles and ceramic samples have been studied. It has been established that cell volume for nanoparticles increases with growing of iron content, while this dependence displays an opposite trend in the case of ceramic samples. Mössbauer investigations have shown that in all samples, the oxidation state of iron is +3. According to magnetic studies, at room temperature, both nanoparticles and ceramic samples with y ≤ 0.06 display superparamagnetic properties and samples with y ≥ 0.08 are paramagnetic. Magnetic fluids based on La0.77Sr0.23Mn1 - y Fe y O3 nanoparticles and aqua solution of agarose have been prepared. It has been established that heating efficiency of nanoparticles under an alternating magnetic field decreases with growing of iron content.
authors.affiliation: V. I. Vernadskii Institute of General and Inorganic Chemistry of the NAS of Ukraine, 32/34 Palladina Ave., Kyiv, 03142, Ukraine. yuliashlapa@ukr.net.
authors.forename: Yulia
authors.initials: Y
authors.lastname: Shlapa
authors.affiliation: Institute of Physics of the NAS of Ukraine, 46 Nauky Ave., Kyiv, 03028, Ukraine. koks061@gmail.com.
authors.forename: Mykola
authors.initials: M
authors.lastname: Kulyk
authors.affiliation: Institute of Physics of the NAS of Ukraine, 46 Nauky Ave., Kyiv, 03028, Ukraine. vmkalita@ukr.net.
authors.forename: Viktor
authors.initials: V
authors.lastname: Kalita
authors.affiliation: Institute of Magnetism of the NAS of Ukraine and MES of Ukraine, 36-b Vernadsky Ave., Kyiv, 03142, Ukraine. polek.taras@gmail.com.
authors.forename: Taras
authors.initials: T
authors.lastname: Polek
authors.affiliation: Institute of Magnetism of the NAS of Ukraine and MES of Ukraine, 36-b Vernadsky Ave., Kyiv, 03142, Ukraine. atov@imag.kiev.ua.
authors.forename: Alexandr
authors.initials: A
authors.lastname: Tovstolytkin
authors.affiliation: LUNAM, Institut des Molécules et Matériaux du Mans (IMMM UMR CNRS 6283), Université du Maine, 72085, Le Mans, Cedex, France. jean-marc.greneche@univ-lemans.fr.
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Greneche
authors.affiliation: V. I. Vernadskii Institute of General and Inorganic Chemistry of the NAS of Ukraine, 32/34 Palladina Ave., Kyiv, 03142, Ukraine. solopan@ukr.net.
authors.forename: Sergii
authors.initials: S
authors.lastname: Solopan
authors.affiliation: V. I. Vernadskii Institute of General and Inorganic Chemistry of the NAS of Ukraine, 32/34 Palladina Ave., Kyiv, 03142, Ukraine. belous@ionc.kar.net.
authors.forename: Anatolii
authors.initials: A
authors.lastname: Belous
keywords: Crystalline structure; Curie temperature; Magnetic nanohyperthermia; Manganite nanoparticles; Mössbauer spectroscopy; Specific loss power