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首页> 美国卫生研究院文献>Nanoscale Research Letters >Iron-Doped (LaSr)MnO3 Manganites as Promising Mediators of Self-Controlled Magnetic Nanohyperthermia
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Iron-Doped (LaSr)MnO3 Manganites as Promising Mediators of Self-Controlled Magnetic Nanohyperthermia

机译：掺铁（LaSr）MnO3锰有望成为自控磁纳米热疗的媒介

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Fe-doped La0.77Sr0.23Mn1 − yFeyO3 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 − yFeyO3 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.
机译：通过溶胶-凝胶法合成了掺铁的La0.77Sr0.23Mn1- yFeyO3纳米粒子，并在1613K下烧结了基于它们的陶瓷样品。研究了所得纳米粒子和陶瓷样品的晶体学和磁性。已经确定，纳米颗粒的细胞体积随着铁含量的增加而增加，而在陶瓷样品的情况下，这种依赖性显示出相反的趋势。 Mössbauer的研究表明，在所有样品中，铁的氧化态均为+3。根据磁性研究，在室温下，y≤0.06的纳米颗粒和陶瓷样品均显示超顺磁性，而y≥0.08的样品均为顺磁性。制备了基于La0.77Sr0.23Mn1 ^ -yyFeyO3纳米粒子的磁性流体和琼脂糖水溶液。已经确定，在交变磁场下纳米颗粒的加热效率随着铁含量的增加而降低。

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