Enhanced coercive field of cobalt film deposited on noodle-like porous silicon substrates

Sun, Z. G.; Akinaga, H.
May 2005
Applied Physics Letters;5/2/2005, Vol. 86 Issue 18, p181904
Academic Journal
Cobalt films were deposited on special porous silicon substrate composing of nanosized noodle-like channels with large length-to-axis ratio. Modulation effects due to the substrate on microstructure, domain structures, and magnetic properties of the Co films were studied. Magnetic images and hysteresis loops indicate that a large uniaxial in-plane shape anisotropy is induced in the magnetic cobalt films. Accordingly, the magnetization of the magnetic cobalt films lies in the film plane, along the noodle direction. The coercivity of the cobalt films is enhanced as compared to reference cobalt film that was grown on a flat silicon substrate.


Related Articles

  • Nanostructures and magnetic properties of cobalt ferrite (CoFe2O4) fabricated by electrospinning. Sangmanee, Montana; Maensiri, Santi // Applied Physics A: Materials Science & Processing;Oct2009, Vol. 97 Issue 1, p167 

    This paper describes the fabrication of cobalt ferrite (CoFe2O4) nanostructures (in the form of nanofibers and nanoparticles) by the electrospinning method using a solution that contained poly(vinyl pyrrolidone) (PVP) and cheap Co and Fe nitrates as metal sources. The as-spun and calcined...

  • Synthesis and microwave electromagnetic properties of CoFe alloy nanoflakes prepared with hydrogen-thermal reduction method. Gong, Y. X.; Zhen, L.; Jiang, J. T.; Xu, C. Y.; Shao, W. Z. // Journal of Applied Physics;Sep2009, Vol. 106 Issue 6, p064302-1 

    CoFe alloy nanoflakes (NFs) with diameter and thickness on nanoscale were prepared by hydrogen-thermal reduction in CoFe2O4 flakes at 400 °C for 60 min. The effective complex permittivity and permeability of CoFe alloy NFs/paraffin composites were measured and compared with that of CoFe alloy...

  • Experimental and theoretical investigation of cubic FeCo nanoparticles for magnetic hyperthermia. Jing, Ying; Sohn, Hweerin; Kline, Timothy; Victora, Randall H.; Wang, Jian-Ping // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07B305 

    Magnetic nanoparticles have great potential as heating elements for use in magnetic hyperthermia for cancer therapy and drug release. A problem with widely used magnetite and mag-hematite nanoparticles is the relatively low magnetization, which results in low heating efficiency. Here...

  • Novel electronic design for double-modulation spectroscopy of semiconductor and semiconductor microstructures. Ho, Ching-Hwa; Hsieh, Chang-Hsun; Chen, Ying-Jui; Huang, Ying-Sheng; Tiong, Kwong-Kau // Review of Scientific Instruments;Nov2001, Vol. 72 Issue 11, p4218 

    The double-modulation reflectance technique has proven to be a powerful characterization tool of semiconductors applied in high-background–light-interference systems. In this article, we present a novel and inexpensive electronic-circuit design for implementing the double-modulation...

  • Microstructure of visibly luminescent porous silicon. Cole, M.W.; Harvey, J.F. // Applied Physics Letters;6/1/1992, Vol. 60 Issue 22, p2800 

    Investigates the microstructure of visibly luminescent porous silicon (Si) formed by electrochemical etching of Si wafers. Characterization of microstructure by cross-sectional high-resolution transmission electron microscopy; Evidence on the Si crystallites content in microstructures; Details...

  • Ferroelectric and leakage current behaviors of BiFeO3-Bi(Zn1/2Ti1/2)O3 ceramics. Cho, J. H.; Song, T. K.; Wang, L.; Yeo, H.-G.; Sung, Y.-S.; Kim, M.-H.; Park, D.-S. // Journal of Applied Physics;Mar2009, Vol. 105 Issue 6, p061640 

    BiFeO3-Bi(Zn1/2Ti1/2)O3 (BF-BZT) ceramics were made by a solid state reaction method. Crystal structure and microstructure were observed. Leakage currents were much reduced with BZT doping in BF. Dielectric constants of BF-BZT increased as frequency is decreased. Two distinctive relaxations were...

  • Nanocomposite Sm2Co17/Co permanent magnets by mechanical alloying. Chen, S. K.; Tsai, J. L.; Chin, T. S. // Journal of Applied Physics;4/15/1996, Vol. 79 Issue 8, p5964 

    Prepares the mechanically alloyed magnets samarium cobalt (SmCo)[subx] using starting materials of commercial SmCo[sub5] and Co powders. Remanence enhancement for isotropic nanocomposites; Results and discussion; Magnetic hysteresis loop of mechanically alloyed SmCo[sub10].

  • Connections between morphological and mechanical evolution during galvanic corrosion of micromachined polycrystalline and monocrystalline silicon. Miller, David C.; Boyce, Brad L.; Kotula, Paul G.; Stoldt, Conrad R. // Journal of Applied Physics;Jun2008, Vol. 103 Issue 12, p123518 

    Many microsystems fabrication technologies currently employ a metallic overlayer, such as gold, in electrical contact with silicon structural layers. During postprocessing in hydrofluoric-based acid solutions, a galvanic cell is created between the silicon and the metallic layer. Micromachined...

  • Seeded Porous Silicon Preparation as a Substrate in the Growth of ZnO Nanostructures. Eswar, Kevin Alvin; Lepit, Ajis; Rasmidi, Rosfayanti; Shuhaimi, Husairi Fadzilah; Abdullah, Nurul Afaah; Noor Aadilla Abdul Aziz; Nur Amierah Mohd Asib; Aziz, Azlinda; Khusaimi, Zuraida; Alrokayan, Salman A. H.; Khan, Haseeb A.; Rusop, Mohamad; Abdullah, Saifollah // Applied Mechanics & Materials;2015, Vol. 773-774, p626 

    In this work, seeded porous silicon (PSi) was used as a substrate in the growth of ZnO nanostructures. PSi was prepared by electrochemical etching method. ZnO thin films as seeded were deposited via sol-gel spin coating method. ZnO nanostructures were grown on seeded PSi using hydrothermal...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics