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首页> 外文会议>Pits and pores 4: New materials and applications - in memory of ulrich gosele >A porous silicon/iron oxide nanocomposite with superparamagnetic and ferromagnetic behaviour
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A porous silicon/iron oxide nanocomposite with superparamagnetic and ferromagnetic behaviour

机译：具有超顺磁性和铁磁性行为的多孔硅/氧化铁纳米复合材料

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摘要

The infiltration of iron oxide nanoparticles into mesoporous silicon is performed to investigate the influence of different arrangements of the particles on the magnetic behaviour of the achieved nanocomposite consisting of a semiconductor and a magnetic material. The porous silicon is fabricated from a highly doped n-type silicon wafer by anodization. The Fe_3O_4 particles fabricated by high temperature decomposition offer a size of 5 and 8 nm, respectively. In the present work the influence of the porous silicon matrix on the magnetic behaviour of such hybrid materials is figured out. In general iron oxide particles of a few nanometer in size are superparamagnetic but due to dipolar coupling between them the blocking temperature can be shifted, which is demonstrated by modification of the particle size and the distance between the particles.
机译：进行氧化铁纳米颗粒向中孔硅中的渗透以研究颗粒的不同排列对所获得的由半导体和磁性材料组成的纳米复合材料的磁性能的影响。多孔硅是通过阳极氧化从高掺杂n型硅晶片制成的。通过高温分解制备的Fe_3O_4颗粒的尺寸分别为5 nm和8 nm。在目前的工作中，已经弄清楚了多孔硅基质对这种混合材料的磁性能的影响。通常，几纳米大小的氧化铁颗粒是超顺磁性的，但是由于它们之间的偶极耦合，可以改变阻挡温度，这可以通过改变颗粒尺寸和颗粒之间的距离来证明。

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  • 来源
  • 会议地点 Las Vegas NV(US);Las Vegas NV(US)
  • 作者

    P. Granitzer; K. Rumpf; M. Venkatesan; L. Cabrera; A.G. Roca; M.P. Morales; P.Poelt; M. Albu;

  • 作者单位

    Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, A-8010 Graz,Austria;

    Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, A-8010 Graz,Austria;

    Institute of Physics, Trinity College Dublin, College Green, Dublin 2, Ireland;

    Institute de Ciencia de Materials de Madrid, CSIC, Sor Juana Ines de la Cruz 3, Cantoblanco, 28049 Madrid, Spain;

    Institute de Ciencia de Materials de Madrid, CSIC, Sor Juana Ines de la Cruz 3, Cantoblanco, 28049 Madrid, Spain;

    Institute de Ciencia de Materials de Madrid, CSIC, Sor Juana Ines de la Cruz 3, Cantoblanco, 28049 Madrid, Spain;

    Institute for Electron Microscopy, University of Technology Graz, Steyrergasse 17,A8010 Graz, Austria;

    Institute for Electron Microscopy, University of Technology Graz, Steyrergasse 17,A8010 Graz, Austria;

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  • 正文语种 eng
  • 中图分类 电工材料;
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