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Magnetic properties of magnetite nanoparticles crystallized in sodium-aluminoborosilicate glass matrix

机译:钠铝硼硅酸盐玻璃基体中结晶的磁铁矿纳米颗粒的磁性

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摘要

Magnetite (Fe_3O_4) nanoparticles were crystallized from soda alumina borosilicate glasses with the composition (24-y)Na_2O·yAl_2O_3·14B_2O_3·37SiO_2·25Fe_2O_3, where y = 8, 12, 14, 16 mol%. All samples are phase separated into magnetite core, enriched in iron oxide, and a glass shell. The magnetic core phase consists of nanocrystallites with sizes ranging between 25 and 40 nm, depending on the respective glass composition. All samples show characteristic well-defined hysteresis loops at room temperature, indicating that the magnetite particles are ferrimagnetic. No evidence for the existence of super-paramagnetic particles is found by measuring the ZFC and FC thermomagnetic curves.
机译:从具有组成(24-y)Na_2O·yAl_2O_3·14B_2O_3·37SiO_2·25Fe_2O_3的钠铝硼硅酸钠玻璃中结晶磁铁矿(Fe_3O_4)纳米颗粒,其中y = 8、12、14、16 mol%。将所有样品相分离成磁铁矿芯,富含氧化铁和玻璃壳。磁芯相由纳米晶体组成,纳米晶体的尺寸范围在25到40 nm之间,具体取决于相应的玻璃成分。所有样品在室温下均显示出特征明确的磁滞回线,表明磁铁矿颗粒具有亚铁磁性。通过测量ZFC和FC热磁曲线,没有发现存在超顺磁性粒子的证据。

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  • 来源
    《Applied Physics》 |2016年第3期|160.1-160.7|共7页
  • 作者单位

    Department of Physics, University of Sofia 'St. Kl. Ohridski', 5 James Bourchier Blvd, 1164 Sofia, Bulgaria;

    Department of Physics, University of Sofia 'St. Kl. Ohridski', 5 James Bourchier Blvd, 1164 Sofia, Bulgaria;

    University of Chemical Technology and Metallurgy, 8 Kl. Ohridski Blvd, 1756 Sofia, Bulgaria;

    Institute of Physical Chemistry, Bulgarian Academy of Sciences, Block 11, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria;

    Otto Schott Institute, Friedrich Schiller University, Fraunhoferstr. 6, 07743 Jena, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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